Device arrangement and method for implementing a data transfer network used in remote control of pro

专利摘要:
In a remote control method according to the invention a virtual private network is established between a home control network key and a home control network device of the remote control system in a property. In order to establish the virtual private network both the home control network key and the home control network device determine their network paths (201 ) to the Internet from the data transfer network to which they are connected. The determined network paths are stored (202) in a home control network server on the Internet. When it is desired to form a virtual private network, the home control network server supplies the stored network paths to the home control network key and the home control network device. By utilising the received network paths the home control network key and the home control network device start establishing a virtual private network (55) between them with several known by them establishing methods of a data transfer connection.
公开号:AU2013208840A1
申请号:U2013208840
申请日:2013-01-07
公开日:2014-08-21
发明作者:Veikko Ylimartimo
申请人:TOSIBOX Oy；
IPC主号:H04L29-06

专利说明:
WO 2013/104823 PCT/F12013/050011 1 Device arrangement and method for implementing a data transfer network used in remote control of properties The invention relates to a method for providing a data transfer network required by the remote-controllable actuators in a property. 5 Remote-controllable devices and systems are increasingly being installed in properties and homes. The purpose of the systems is to secure and/or maintain such conditions in properties, so that living in them is both safe and pleasant. The spectrum of remote-controlled or remote-monitored devices is wide. The same 10 property may have devices from several suppliers. These devices can often not communicate directly with each another. It is also common that each system has its operation logic, the remote controlling of which requires the use of a particular data communications solution. 15 Building service suppliers have lately started to solve the problem very generally by ordering from an operator for the customer target its own, separately costing additional connection, which contains certain target-specific agreed-on features and must be separately maintained, either via a telephone network or a broad band network, which broadband network can be a permanent of wireless 2G/3G 20 network broadband connection. Most suppliers have found this to be the easiest mode of operation for them at the moment, even though it contains several prob lematic points. If a new additional connection is provided for the target, data communications 25 matters must often be agreed upon separately with an administrator of the local intranet. The intranet administrator probably has to make additional network con figurations for the connection, so that establishing a remote connection can suc ceed. 30 One can try to solve remote use of the target also with an application-specific so lution. Thus the device supplier can buy from the operator its own radio network and form in it a private access point name (APN), which determines data commu nications settings in GPRS (General Packet Radio Service) and HSDPA (High Speed Downlink Packet Access) /HSUPA (High Speed Uplink Packet Access) 35 networks. By using APN settings, an Internet connection is provided via a wireless 2G/3G/4G network to the devices in the target. In such cases, the user must pay separately for the connection and for the interface modems and programs ena- WO 2013/104823 PCT/F12013/050011 2 bling its remote use. Often such an additional connection cannot or may not be used for more than one use purpose, for example for the remote use of devices supplied by the building service supplier. Additionally, operators nowadays gen erally limit the maximum amount of data transfer in such connections, which when 5 exceeded may cause large additional invoices for the connection owner. In housing cooperative type targets, which have several properties, the properties may be connected to "remote use" taking place only within the intranet formed be tween the properties. No real remote contact is obtained for such targets, if the 10 remote contact user is physically elsewhere than in one of the properties in ques tion in the intranet. It is an object of the invention to provide a new encrypted data transfer arrange ment required by the remote control arrangement of the technical devices in the 15 property, where the Internet connection already existing in the properties and homes is utilised as such in the remote use of the building service and surveil lance. With the establishing method of the data communication connection ac cording to the invention the destination connection of the property is altered to be as such suitable for remote use. Already existing functions of the data network 20 connection in the target and the intranet in the target are not altered. The objects of the invention are achieved with an establishing method of a data transfer connection, in which a home control network device installed in a fixed manner in a property and a home control network key of a person realising moni 25 toring of the property establish a secure two-way connection over the Internet based on contact information they have received from a home control network server according to the invention. The home control network device in the proper ty, to which the devices to be remote-controlled or remote-monitored in the prop erty are connected, are connected to a data network interface device/network 30 terminal in the property, for example a modem. The current IP addresses of the home control network device and the home con trol network key are maintained in the home control network server related to the invention, which IP addresses are used for establishing a connection between 35 said devices. Due to the connection establishing methods according to the inven tion both said devices can be connected to some private, non-public network, and they can still establish among themselves a secure data transfer connection over the Internet. Advantageously, it is enough for establishing the data transfer con- WO 2013/104823 PCT/F12013/050011 3 nection over the Internet between the mobile home control network key and the fixed installed home control network device that said devices at some point in the established connection also obtain a public IP address, even though simultane ously the home control network device and the home control network key only 5 have non-public IP addresses. In a preferred embodiment of the invention, the home control network server does not participate in the establishing of the actual data transfer connection after it has sent the IP addresses of the devices to be available to the devices. 10 An advantage with the establishing method of the data transfer connection utilized in remote control system according to the invention in a property is that both the devices in the home control network device pair can search their routing from their placement location to the IP address of the device of the property connecting to the Internet and store the searched route in a separate home control network 15 server on the Internet for the identification and IP address of the device pairs. It is further an advantage of the invention that each home control network device pair according to the invention forms independently among themselves a prede termined unique device pair or device group, which identify each other in the data 20 transfer network to be established. Due to the identification method the home con trol network key carried with the user or a computer program installed in some da ta processing device, which computer program implements the functions of a home control network key, establishes a network connection only with its own unique home control network device pair, and the connection cannot be estab 25 lished with any other network device. It is further an advantage of the invention that the device pair of the remote control system according to the invention can among themselves independently with the aid of the address information of the home control network server establish a data 30 link layer (Layer 2) level or also a network layer (Layer 3) level data transfer con nection according to a direct two-way secure OSI model (Open Systems Intercon nection Reference Model) through the serving local network devices and the In ternet (VPN; Virtual Private Network). 35 It is further an advantage of the invention that the home control network device pair can establish among themselves a secure data transfer connection also through such firewalls that change occasionally either their source or destination ports.
WO 2013/104823 PCT/F12013/050011 4 The establishing method of a virtual private network between two network termi nals of a home control network according to the invention is characterised in that - both the first network terminal and the second network terminal that form a pre 5 determined network terminal pair, the members of which are allowed to communi cate only with each other, send at times a poll to the home control network server, in which it is asked whether the other device of the device pair is connected to the data transfer network, and if it is, then - both the first network terminal and the second network terminal connect to the 10 home control network server to establish a virtual private network and request the routing information from the home control network server in order to establish an end-to-end data transfer connection between said network terminals - the home control network server sends both to the first network terminal and the second network terminal the requested routing information after it has checked 15 that the network terminals are the predetermined network terminal pair, and that - the first network terminal and the second network terminal start with several known establishing methods of a virtual private network an establishing process of an end-to-end data transfer connection in order to provide at least one virtual private network. 20 The home control network key according to the invention to be connected to the virtual private network is characterised in that it may include a processor, a memory and a computer program code stored therein, that are configured to - send at times a poll to the home control network server, in which it is asked 25 whether the home control network device predetermined to be the network termi nal pair of the home control network key and with which home control network de vice the home control network key is allowed to communicate, is connected to the data transfer network, and if it is, then - connect to the home control network server and to request the routing infor 30 mation of the home control network device from the home control network server in order to establish a virtual private network to the home control network device - receive the routing information of the home control network device from the home control network server and - start with several known establishing methods of a virtual private network an es 35 tablishing process of an end-to-end data transfer connection in order to provide at least one virtual private network with the home control network device.
WO 2013/104823 PCT/F12013/050011 5 The home control network device according to the invention in a property and which is to be connected to the virtual private network is characterised in that its processor, memory and computer program code stored therein are configured to - send at times a poll to the home control network server, in which it is asked 5 whether the home control network key predetermined to be the network terminal pair of the home control network device and with which home control network key the home control network device is only allowed to communicate, is connected to the data transfer network, and if it is, - connect to the home control network server and to request the routing infor 10 mation of the home control network key from the home control network server in order to establish a virtual private network to the home control network key - receive the routing information of the home control network key from the home control network server, and - start with several known establishing methods of a virtual private network an es 15 tablishing process of an end-to-end data transfer connection in order to provide at least one virtual private network with the home control network key. The computer program according to the invention, utilised in a home control net work key, is characterised in that it comprises 20 - code means for sending at times a poll to the home control network server, in which it is asked whether the home control device with which the home control network key forms a predetermined terminal pair, the members of which are al lowed to communicate only with each other, is connected to the data transfer net work, and if it is, then 25 - code means for making a connection to the home control network server and for requesting the routing information of the home control network device from the home control network server in order to establish a virtual private network to the home control network device - code means for receiving the routing information of the home control network 30 device from the home control network server, and - code means for starting with several known establishing methods of a virtual private network an establishing process of an end-to-end data transfer connection in order to provide at least one virtual private network with the home control net work device. 35 The computer program according to the invention, utilised in a home control net work device, is characterised in that it comprises WO 2013/104823 PCT/F12013/050011 6 - code means for sending at times a poll to the home control network server, in which it is asked whether the home control network key, with which the home con trol network device forms a predetermined network terminal pair, the members of which are allowed to communicate only with each other, is connected to the data 5 transfer network, and if it is, - code means for making a connection to the home control network server and for requesting the routing information of the home control network key from the home control network server in order to establish a virtual private network to the home control network key 10 - code means for receiving the routing information of the home control network key from the home control network server, and - code means for starting with several known establishing methods of a virtual private network an establishing process of an end-to-end data transfer connection in order to provide at least one virtual private network with the home control net 15 work key. Some advantageous embodiments of the invention are presented in the depend ent claims. 20 The basic idea of the invention is the following: In order to implement remote con trol in some property a device pair, a home control network device and a home control network key (device) have been manufactured, where at least one home control network device and at least one home control network key (device) can establish a secure data transfer connection only with each other. Said home con 25 trol network key (device) may either be a separate electronic device manufactured for this purpose or it may also be some data processing device, in which a com puter program according to the invention has been installed, which program im plements the home control network key functions. 30 The home control network device in the property to be remote-controlled is in stalled in an existing intranet network or Internet network in the property to be controlled. It establishes one subnetwork, a control intranet network, in the intra net or Internet network, to which control intranet network various actuators to be controlled in the property are connected either with a wired or wireless data trans 35 fer connection. In one advantageous embodiment of the invention an individual home control network key or several home control network keys can function as the device pair WO 2013/104823 PCT/F12013/050011 7 of two or more home control network devices in different properties. The identifi cation codes of the home control network device and the home control network key are stored in said devices in connection with their manufacturing, or said de vices change their identification codes when they are connected for the first time 5 for example at their USB ports. By using the identification codes the home control network device and the home control network key establish a two-way secure data transfer connection between them. In connection with the start-up, both devices determine routing information of the 10 devices from their location network all the way to a network terminal connected to the Internet, which routing information is needed for the connection establishment. This routing information is stored in a home control network server according to the invention, connected to the Internet. When the home control network key (de vice) wants to establish a data transfer connection via the Internet to its device 15 pair in some property, it retrieves the routing information of the home control net work device functioning as its pair from the home control network server. By utilis ing the obtained routing information the home control network key starts the es tablishing process of a direct end-to-end data transfer connection, by which pro cess advantageously a secure virtual private network (VPN) is established be 20 tween the home control network key and the home control network device. In this establishment of the data transfer connection suitable data transfer protocols are used as required. It can be attempted to establish an end-to-end data transfer connection advanta 25 geously first as a TCP-based data transfer connection or as a UDP-based data transfer connection, if this is allowed by the data transfer network components be tween the devices. If the data transfer connection to be established has network components (e. g. 30 firewalls) that change their source and/or destination ports occasionally in order to prevent network attacks, then it is attempted to establish an end-to-end data transfer connection advantageously, in addition to the above-mentioned, also by using UDP port scanning. Besides the UDP port scanning, it can be attempted to establish an end-to-end data transfer connection also by using the ICMP protocol. 35 If for one reason or other a direct end-to-end data transfer connection cannot be established with the above-mentioned protocols, a TCP-protocol-based secure tunnel is established through a home control network server related to the inven- WO 2013/104823 PCT/F12013/050011 8 tion. In this embodiment, the home control network server does not encrypt the secure messages received by it, but passes them as such directly to the receiving device. If it is found during this established TCP relaying connection, that it would be possible to establish a VPN data transfer connection, then the data transfer is 5 advantageously changed to this other two-way end-to-end data transfer connec tion. When either a direct data transfer connection or a data transfer connection, re layed through the home control network server has been established, a direct 10 VPN data transfer connection has been established between the home control network key and the home control network device in the property. A home control network device according to the invention is installed in the inter nal data transfer network of a property to be remote-controlled between an exist 15 ing internal data transfer network related to control and management of the prop erty and a network terminal relaying traffic from the property to the Internet. All devices related to property control are connected to the inputs of the home control network device and the output of the home control network device is connected to the input meant for the intranet device of the network terminal relaying Internet 20 traffic. In a home control network system according to the invention the home control network key is a device of a network terminal and a suitable data processing de vice, connected either wireless or by means of a cable connection. 25 In another embodiment according to the invention the home control network key can be connected to some data processing device connected to the Internet. Pos sible data processing devices are, for example, a PC, a tablet computer or a smartphone. In this embodiment, the connection of the home control network key 30 to the data processing device can be done for example with the aid of a LAN inter face (Local Area Network), a WLAN interface (Wireless LAN), a WAN interface (Wide Area Network), a USB interface (Universal Serial Bus) or an antenna inter face. 35 In one advantageous embodiment of the invention, the computer program imple menting the functions of the home control network key is stored on a portable data storage means, for example a USB stick, from which the computer program can be installed into a suitable data processing device. The program installed in the WO 2013/104823 PCT/F12013/050011 9 data processing device simulates all the functions of the home control network key. In the following, the invention will be described in detail. In the description, refer 5 ence is made to the enclosed drawings, in which Figure 1 a shows by way of example how a two-way data transfer connection ac cording to the invention can be established between a client device handling remote control and an individual control or management de vice of a property, 10 Figure 1 b shows another example according to the invention, in which a two-way data transfer connection can be established between a client device handling remote control and an individual control or management de vice of a property, Figure 2 shows as an exemplary flow chart, how a data transfer connection be 15 tween the client device and the device in a property is established, Figure 3a shows by way of example the partial steps included in step 201 in Fig ure 2, Figure 3b shows by way of example the establishing step included in step 206 in Figure 2, 20 Figure 4 shows by way of example a home control network device according to the invention, Figure 5a shows by way of example a home control network key according to the invention, Figure 5b shows by way of example another home control network key according 25 to the invention, Figure 6 shows by way of example a home control network server according to the invention, and Figure 7 shows connection layers according to the invention, utilised in the home control network system.
WO 2013/104823 PCT/F12013/050011 10 The embodiments in the following description are given as examples only, and someone skilled in the art may realise the basic idea of the invention also in some other way than what is described in the description. Though the description may refer to a certain embodiment or embodiments in several places, this does not 5 mean that the reference would be directed towards only one described embodi ment or that the described characteristic would be usable only in one described embodiment. The individual characteristics of two or more embodiments may be combined and new embodiments of the invention may thus be provided. 10 Figures Ia and 1b show two advantageous embodiments 1 A and 1 B of the remote control system according to the invention. In the examples of Figures la and lb one home control network key 42, 42b or a data processing device 41 c, which has been converted by software into a home control network key, is used to establish a data transfer connection to one home control network device 61 in some proper 15 ty. The home control network key 42, 42b or the data processing device 41 c con verted into a home control network key according to the invention can however advantageously also function with separate home control network devices in two or more properties. 20 In both embodiments of Figures la and lb the data transfer network mainly has the same basic network structure. In both Figures the Internet is shown with refer ence 2. Some public network or an intranet, reference 3, is also connected to the Internet 2. The network 3 may be a fixed or a wireless data transfer network. In Figure Ia, a first data transfer network 4, the house control remote network of the 25 property, is connected to the network 3, to which house control remote network the client device implementing the remote control, reference 41 a, can be connect ed. In Figure 1b, the home control network key 42b is connected to the data pro cessing device 41c, which again is connected to a public network / intranet net work 3. 30 When a home control network device 61 or a home control network key 42, 42b is connected to its own local data transfer network, it sends at times a poll to the home control network server 21 belonging to the remote control system, in order to find out whether its own counterpart device is connected to the network or not. 35 If it becomes evident from the reply sent by the home control network server 21 that the counterpart device is connected to its own data transfer network, both members of the device pair start the establishing process of a virtual private net work (VPN data transfer connection) by procedures described below.
WO 2013/104823 PCT/F12013/050011 11 The house intranet in the property to be remote-controlled is in Figures 1a and 1 b designated with reference 5. A second data transfer network 6, a house control in tranet, is connected to the house intranet network 5. The actuators 62-65 to be 5 remote-controlled in the property are connected to the house control intranet. It is evident to someone skilled in the art that there may also be more subnetworks between the home control network device 61 and/or the home control network key 42, 42b or 41 c according to the invention and the Internet 2 than what is shown in 10 Figures 1a and lb. In the examples of Figures 1 a and 1 b, the second network terminal according to the invention, the home control network device 61 (HCND), is connected to the house intranet network 10.0.0.0/24, reference 5. The house intranet network 5 is 15 connected to the Internet 2 with network terminal 51. The network terminal 51 can be a router, a modem or a firewall, which can include also a network address translator NAT. In the examples of Figures 1a and 1b the house intranet 5 is be hind a firewall FW1, reference 51, containing a NAT function. The public IP ad dress of the firewall FW1 in the examples of Figures 1 a and 1 b is 240.1.1.2. In the 20 house intranet 5 the internal IP address of the firewall FW1 is 10.0.0.1. Two ex emplary other data processing devices are also connected to the house intranet network 5, the IP addresses of which in the house intranet network are 10.0.0.3 and 10.0.0.4. 25 The house control intranet network 172.17.0.0/24 (HCI), reference 6, is connected to the house intranet network 5 via the home control network device 61. The IP address of the home control network device 61 in the house control intranet net work is 172.17.0.1 and in the house intranet network 10.0.0.2. In the examples in Figures 1a and 1b, four exemplary devices/servers 62, 63, 64 and 65 are con 30 nected to the house control intranet 6. The devices/servers can be connected to the house control intranet 6 either with a permanent connection or a wireless data transfer connection. Reference 62 shows a lighting control webserver, the IP address of which in the 35 house control intranet network is 172.17.0.5. For a remote user the lighting control webserver 62 is seen as device HCND4.
WO 2013/104823 PCT/F12013/050011 12 Reference 63 shows a heat control webserver, the IP address of which in the house control intranet network is 172.17.0.4. For a remote user the heat control webserver 63 is seen as device HCND1. 5 Reference 64 shows a surveillance camera webserver, the IP address of which in the house control intranet network is 172.17.0.3. For a remote user the surveil lance camera webserver 62 is seen as device HCND2. Reference 65 shows an air-conditioning webserver, the IP address of which in the 10 house control intranet network is 172.17.0.2. For a remote user the air conditioning webserver 65 is seen as device HCND3. In the example of Figure 1a the first network terminal according to the invention, the home control network key 42 (HCNK), is connected to the house control re 15 mote network 172.17.0.0/24, reference 4. The house control remote network 4 is behind the intranet 3 firewall FW2, reference 31. The public IP address of the NAT firewall 31 is in this example 240.2.1.2 and the internal IP address of the NAT firewall is 10.0.1.1. The house control remote network 172.17.0.0/24 (HCRN), reference 4, is con 20 nected to the data transfer network 3 via a home control network key 42 according to the invention The IP address of the home control network key 42 in the intranet network is 10.0.1.2 and in the house control remote network 172.17.0.6. In the examples of Figures 1a and 1b, an exemplary data processing device 41a has been connected to the house control remote network 4, the IP address of which 25 data processing device in the house control remote network 4 is 172.17.0.7. This data processing device 41a is used, when it is desired to remotely control devic es/servers 62, 63, 64 or 65 connected to the house control intranet network 6. The home control network key 42 and the home control network device 61 accord 30 ing to the invention need each other's routing information, in order for them to be able to establish between them a data transfer connection based either on a data link layer or on a network layer, in the examples of Figures Ia and 1b a VPN data transfer connection 55. The determined routing information is stored by both the home control network key 42 and the home control network device 61 according 35 to the invention in a home control network server 21 (HCNS) on the Internet. In the example of Figure 1a the NAT firewalls do not completely restrict outgoing UDP communication. They are so-called NAT firewalls in one state and "with WO 2013/104823 PCT/F12013/050011 13 memory", which also do not change the source port numbers of UDP connections (User Datagram Protocol) unforeseeably, if they do not have to. In the example of Figure 1a the object is to establish in the data link layer an Ethernet level connec tion between the home control network key 42 and the home control network de 5 vice 61. When in the remote control system 1A according to Figure 1a it is desired to es tablish a data transfer connection 55 belonging to a virtual private network (VPN) between the devices, then both devices 42 and 61 retrieve from the home control 10 network server 21 the routing information stored therein by the counterpart de vice. Before handing over the routing information, the home control network serv er 21 checks that it is really a question of an allowed home control network key/home control network device pair. With the aid of the retrieved routing infor mation the home control network key 42 and the home control network device 61 15 establish a direct VPN connection between them. When the VPN connection 55 is completed, a data processing device 41 a in the house control remote network 4 can make contact with a device 62, 63, 64 or 65 in the house control network 6. In order for it to be possible to establish the data transfer connection, the home 20 control network key 42 and the home control network device 61 must determine their network path from their own network at least to the Internet 2. Below, the said network path information is referred to by term routing information. This net work path determination can be made for example in the following manners, which the home control network key 42 and the home control network device 61 advan 25 tageously utilise. In the example of Figure 1 a, the network routes are determined by the home con trol network key 42 and the home control network device 61. These devices store the discovered network paths on the home control network server 21, which stores them in its memory. 30 The home control network key 42 and the home control network device 61 accord ing to the invention advantageously also have an ability to determine a free cy berspace. Said devices are configured to determine for themselves an available cyberspace automatically, by utilising the network path information on the home 35 control network server 21. Said devices request the home control network server 21 to give some free part of the cyberspace. The home control network server 21 examines the network paths it has received and returns some network block, WO 2013/104823 PCT/F12013/050011 14 where not even one address is mentioned in the network path of any device known thereby. The home control network device 61 also advantageously offers DHCP and DNS 5 services in its own subnetworks 4 and 6 for devices connected thereto. Additional ly the home control network key 42 and the home control network device 61 func tion as a default gateway for devices connected to the subnetwork. Figure 1 b shows another remote control system 1 B according to the invention. In 10 Figure lb the data processing device 41c utilised by the user is connected to a data transfer network depicted with reference number 3. The embodiment of Fig ure 1 b differs from the embodiment of Figure 1 a in that the functions of the home control network key 42 of Figure 1 a are substituted with a home control network key 42b including a USB memory 42e, which can be connected to a data pro 15 cessing device 41c utilised by the client. In this embodiment, the data processing device 41 c and the device 42b together function as the home control network key. In another advantageous embodiment of the invention the computer program im plementing the functions of a home control network key according to the invention 20 is installed to the data processing device 41c. The computer program can advan tageously be stored in the data processing device 41c for example from a USB memory stick by attaching the USB memory stick to a USB port in the data pro cessing device 41c. For someone skilled in the art it is obvious that some other prior art data storage means can also be used as storage means for the computer 25 program. In this embodiment, the data processing device 41c simulates a home control network key according to the invention with a computer program installed therein. In the example of Figure 1b, the home control network key 42 of Figure la is 30 simulated in its entirety or partly in the user's data processing device 41c. The user makes contact with this simulation software with a browser in his data pro cessing device 41c, or alternatively, the simulation software opens a browser win dow in the data processing device 41c. The simulation is started by launching the simulation program according to the invention in the data processing device 41c, 35 which simulation program implements all the functions of a physical home control network key 42 by software.
WO 2013/104823 PCT/F12013/050011 15 In this embodiment, all the functionalities of the home control network key 42 of Figure 1a, communication, start-up and connection establishment, are implement ed by utilising the user's data processing device 41c, whereby a physically sepa rate home control network key 42 according to Figure 1 a is not needed for estab 5 lishing a connection to a device pair 61 in the property. If for some reason the establishment of the above described direct VPN tunnel is not successful between the home control network key 42, 42b or 41c and the home control network device 61 presented in Figures 1 a and 1b or it is successful 10 only occasionally (for example, if the network components change the source and/or destination ports occasionally), the remote control arrangements may uti lise other access protocols described in connection with Figure 3b. Also in this case, for the client device user the remote control system functions in the same way as in the remote control systems presented in Figure 1a or Figure 1b. 15 The following is an example of the operation of the remote control system 1A ac cording to the invention in the example of Figure 1a. The home control network device 61: 20 The home control network device 61 is connected to the 10.0.0.0/24 network (the house intranet 5) for example by attaching a cable to the WAN port of the home control network device 61. The home control network device 61 automatically re trieves its IP settings with the DHCP procedure. A firewall FW1 in the house in 25 tranet network 5 advantageously functions as the DHCP server, which firewall gives the home control network device 61 the IP address 10.0.0.2 in a 24 bit net work mask (255.255.255.0). The DHCP server also gives the default router ad dress 10.0.0.1 and the DNS server address 10.0.0.1. 30 The home control network device 61 begins the communication by ascertaining with the aid of the DNS server the IP address of the home control network server 21 (HCNS, DNS address etahallinta.fi). The DNS server 10.0.0.1 gives the home control network server's 21 IP address as 240.1.1.1. 35 The home control network device 61 makes contact 240.1.1.1 with the home con trol network server 21 over the Internet with a TCP or UDP protocol. The home control network device 61 authenticates the mutual operational rights with the home control network server 21 with certificates and/or passwords determined in WO 2013/104823 PCT/F12013/050011 16 connection with manufacturing. This data transfer connection is advantageously encrypted for example with an SSL/TLS encryption. The home control network server 21 sees from the incoming connection the public IP address of the home control network device 61, which in the example of Figure la is 240.1.1.2. The 5 home control network device 61 notifies the home control network server 21 of its own address and network mask (10.0.0.2/24). The home control network server 21 stores this information in its Tosibox database. The home control network device 61 advantageously also performs a traceroute 10 operation toward the home control network server 21 and reports the discovered network path to the home control network server 21. The home control network server 21 stores the received network path of the home control network device 61 in its Tosibox database. 15 Next the home control network device 61 advantageously also performs an ICMP Record Route operation and reports the discovered route to the home control network server 21. The home control network server 21 stores the route received from the home control network device 61 in its Tosibox database. 20 Thereafter the home control network device 61 performs an automatic determina tion of free cyber space by sending an inquiry to the home control network server 21. The home control network server 21 returns to the home control network de vice 61 in the examples of Figures 1a and 1b the cyber space 172.17.0.0/24. 25 The home control network device 61 takes the cyberspace into use for its intranet 6, and as its own IP address the home control network device 61 takes 172.17.0.1. The home control network device 61 notifies the home control network server 21 about the taking into use, which server stores the information in its Tosibox database. 30 In Figures 1a and 1b, the home control network device 61 is shown as its own separate device, which establishes its own subnetwork for controlling devices in a property. It is obvious to someone skilled in the art that the functions of the home control network device 61 can be integrated as a part of a computerised or house 35 engineering device, which has a sufficient processor and memory capacity and connecting means for connecting various technical means thereto either with a wired data transfer connection or a wireless data transfer connection.
WO 2013/104823 PCT/F12013/050011 17 The home control network key 42: In the example of Figure 1 a, the WAN port of the home control network key 42 is connected to the 10.0.1.0/24 network (data transfer network 3). The home control 5 network key 42 retrieves IP address information from the DHCP server, as which a firewall FW2 functions, reference 31. The home control network key obtains the IP address 10.0.1.2. The address of the default router 31 of the home control net work key 42 is 10.0.1.1 and the address of the DNS server 31 is 10.0.1.1, which are obtained from the DHCP server. 10 The home control network key 42 begins the communication by ascertaining with the aid of the DNS server the IP address of the home control network server 21 (HCNS, DNS address hcns.fi). In the examples of Figures 1 and 2, the DNS serv er 10.0.1.1 gives 240.1.1.1 as the IP address of the home control network server 15 21. Thereafter the home control network key 42 contacts the home control network server 21 on address 240.1.1.1 over the Internet primarily with a UDP protocol, secondarily with a TCP protocol. The home control network key 42 authenticates 20 mutual operational rights with the home control network server 21 with pre distributed certificates and/or passwords. The data transfer connection is advan tageously encrypted for example with an SSLITLS encryption. The home control network server 21 sees from the incoming connection the public IP address 240.2.1.2 of the home control network key 42. The home control network key 42 25 additionally notifies the home control network server 21 of its own address and network mask 10.0.1.2/24. The home control network server 21 stores this infor mation in its Tosibox database. Next, the home control network key 42 performs a traceroute operation and re 30 ports the discovered network path to the home control network server 21, which stores the information in its Tosibox database. The home control network key 42 advantageously also performs an ICMP record route operation and reports the discovered network path to the home control net 35 work server 21, which stores the information in its Tosibox database. The home control network server 21 checks the received route information and if there are overlaps, the home control network server 21 reports them to the home WO 2013/104823 PCT/F12013/050011 18 control network key 42, which if necessary performs the automatic determination of free cyberspace again. A data processing device 41 c as a home control network key: 5 In the embodiment 1 B according to Figure 1 b the home control network key 42 can be replaced either with a home control network key 42b or a user's data pro cessing device 41c, wherein a computer program comprising the functions of the home control network key has been stored from a suitable data storage means, 10 for example a USB memory stick. Said home control network key 42b may advan tageously be a so-called electronic device comprising a USB connection. In the embodiment of Figure 1 b the above-described functions of the home control net work key 42 are performed by a computer program installed into the user's data processing device 41c from a USB memory stick. 15 In the embodiment according to Figure 1 b, the pairing of the home control network key 42b and the home control network device 61 can be determined either in con nection with manufacturing or at the final use target. If the pair determination is done at the final use target, then the home control network key 42b is in the em 20 bodiment according to Figure 1b temporarily connected to the home control net work device 61. The connecting is advantageously implemented either by means of the devices' USB ports or via a wireless radio network. Via the coupling the home control network key 42b and the home control network 25 device 61 can receive the identification code of its device pair and send its own identification code to its device pair. Thereafter these two devices can establish a data transfer connection only with each other. The transfer of the home control network key computer program to the user's user 30 terminal 41 c is advantageously implemented as follows. When the home control network key 42b is momentarily attached by its connec tion to the data processing device 41c, then the computer program contained in the home control network key 42b with its individual identification codes is in 35 stalled in the user's data processing device 41 c, reference 42e. In connection with the installation the data processing device 41c user is asked whether he wants to take into use a protection function of the device and/or program. If it is desired to activate the protection function, then in this case the home control network key in- WO 2013/104823 PCT/F12013/050011 19 stallation program requests that the user gives his password either only to the us er's data processing device 41c or to the installed program or, if desired, to both. The home control network key with its programs, individual identification codes 5 and passwords can if desired also be stored for example on a well-protected in ternal network server, from where it can when necessary be moved back to a new home control network key (e.g. if the original key device is broken or lost). In an advantageous embodiment of the invention the program contained in the 10 home control network key 42b with its identification codes can also be stored on several data processing devices 41c, which may thus function in parallel with the first data processing device. In an advantageous embodiment of the invention the computer program contained 15 in the home control network key 42b may for example also be situated on a server on the Internet, from where it can be retrieved. In this advantageous embodiment the physical home control network key 42b itself may comprise only the identifica tion code needed for identifying the device pair. 20 Figure 2 shows as an exemplary flow chart the operations of the remote control method according to the invention after the home control network key 42 or 42b and the home control network device 61 have been paired together. When a home control network device 61 or a home control network key 42, 42b is 25 connected to its own local data transfer network, it sends / they send at times a poll (so called polling) to the home control network server 21 belonging to the re mote control system, in order to find out whether its own counterpart device pair is connected to the network or not. If it becomes evident from the reply sent by the home control network server 21 that the counterpart device pair is connected to its 30 own data transfer network, then both members of the device pair start the estab lishing process of a virtual private network (VPN data transfer connection) by pro cedures described later. In step 200 the home control network device 61 is connected to the house intranet 35 network 5 and advantageously also the home control network key 42 or the data processing device 41c supporting or simulating the home control network key 4abto the intranet network 3. All devices to be remote-controlled in the property WO 2013/104823 PCT/F12013/050011 20 are connected to the home control network device 61 either with a permanent connection or a wireless connection. In step 201 both the home control network device 61 and the home control net 5 work key 42, 42b or the data processing device 41c simulating the home control network key 41 c determine their network path to the home control network server 21, if their present network path information is not up-to-date. The procedure used in step 201 is shown in more detail in Figure 3a. 10 In step 302 both the home control network device and/or the home control net work key 42, 4a or the data processing device 41 c simulating the home control network key store their determined network paths on the home control network server 21, if the up-to-date network path information was able to be determined. 15 In step 203 the devices 42, 42a or 41c and 61 according to the invention to be uti lised in the remote-controlling receive the information that their device pair has registered with the home control network server 21 or that the registration is miss ing. If the up-to-date network path information of the device 42, 42b, 41 c or 61 ac cording to the invention belonging to one of the device pairs is missing, then the 20 remote control system 1A or 1B moves after a specified delay 212 to the listening and checking step 213 of the home control network server connection. At the start of the connection establishing, both the home control network key 42/42b and the home control network device 61 request in step 204 the up-to-date 25 network path information of the counterpart from the home control network server 21. The home control network server 21 checks that it is a question of a prede termined, allowed device pair, and after the checking it sends the network path in formation to both devices in step 205. Thereafter the home control network server 21 releases the connection to both devices 42/42b and 61 and thus it is no longer 30 a part of the VPN tunnel 55 being formed. In step 206 the home control network key 42/42b/41 c and the home control net work device 61 form a VPN tunnel 55 between them. The partial steps included in step 206 are described in more detail in Figure 3b. 35 In step 207 both the user's client device 41a or 41c and the target device 62-65 in the property are connected to the established VPN network.
WO 2013/104823 PCT/F12013/050011 21 In the embodiment of Figure 1a, the user's client device 41a is connected to the VPN network by the home control network key 42. In the embodiment of Figure 1b, the home control network key 42b connected to the user's data processing device 41c is one of the end points of the VPN network. The device 62-65 to be 5 remote-controlled in the target is connected to the VPN network by the home con trol network device 61. In step 208 the user's client device 41a or 41c and the device 62-65 to be con trolled in the property are part of the same VPN network, whereby they may ex 10 change information between each other. After a delay specified in the remote con trol system, step 209 consists of checking whether the data transfer connection between the client device 41a or 41c and the target device 62-65 is still active. If the data transfer connection is active, the process returns to step 208 and the da ta transfer is allowed to be continued. 15 If it is found in step 209 that the VPN connection is no longer active, then a deci sion is made in step 210 regarding a possible new attempt at establishing a con nection. 20 If it is decided in step 210 to make a new attempt at establishing a connection, then the process branches out to step 214. In step 214 it is checked whether the members know the up-to-date network paths of the counterpart. If the network path information is up-to-date, the process branches out to step 205, where the home control network server sends the up-to-date network path information of the 25 counterpart to the devices according to the invention for establishing a VPN tun nel. If it is found in step 214 that one of the network path details is missing or is not up-to-date, the process returns to step 201, where the determination of the net 30 work path information of one or both of the devices according to the invention is renewed. In this alternative the process advantageously also includes necessary proce dures for releasing the VPN connection, so that the connection establishing pro 35 cess according to the invention itself can be renewed successfully. The connec tion establishing is attempted according to a predetermined number.
WO 2013/104823 PCT/F12013/050011 22 If it is decided in step 210 that a new attempt to establish a VPN connection will not be made any more, because a predetermined number of connection establish ing attempts have been made or it is for some other reason not desired to estab lish a VPN connection, then the process moves to step 211. In step 211 the used 5 VPN data transfer network is released. This is the case for example when the home control network key is switched off. After the VPN data transfer network is released, a predetermined delay 212 fol lows in the process utilised in the remote control system 1A or 1 B. After the delay 10 212 the process moves to the listening function 213 of the home control network server. There at least the current-carrying home control network device 61 sends at times connection requests to the home control network server 21. The home control network device 61 advantageously sends connection requests 15 until the home control network server 21 sends the up-to-date network path infor mation to it. When the network path information is received, the establishing pro cess of the VPN connection starts in step 201. The branching out to step 212 can take place also from step 203. This happens 20 when the network path information of one or both have not been able to be deter mined and stored on the home control network server. Also this branch of the pro cess returns after steps 231 and 214 back to step 201, where at least on of the devices participating in the remote-controlling attempts to determine its network path information and to store it on the home control network server 21. 25 The searching procedures used in step 201 are described in more detail in Figure 3a. In step 2011 is utilised with a DHCP protocol (Dynamic Host Configuration Proto 30 col) the IP settings for the network interface of the data processing device can be retrieved. Settings obtainable with the DHCP procedure include at least the IP address of the data processing device, the network mask, the default gateway and the DNS server (Domain Name System), which transforms the domain names into IP addresses. 35 The Traceroute procedure utilised in step 2012 is a tool using the TCP/IP protocol that ascertains through which route or network path the packets move to the de termined machine. In the Traceroute procedure a data transfer device connected WO 2013/104823 PCT/F12013/050011 23 to the network ascertains the network path by adding the Time to Live value (TTL) of the packets it sends one at a time, starting from zero. Ascertaining the network path typically occurs in the following way. The data pro 5 cessing device sends to the default gateway an IP packet with some target ad dress in the external network using the TTL value "0". The default gateway re sponds to this with a message of TTL expired. For example the IP address, delay etc. of the default gateway becomes clear from this message. 10 Thereafter the data processing device sends to the default gateway an IP packet with some target address in the external network using the TTL value 1. Again the router following the default gateway responds with a message "TTL expired", from which the IP address of this subsequent (second) router becomes clear. This transmission/response process is continued by increasing the TTL value until the 15 desired goal is reached. In the case of the Internet the final goal is typically reached with a TTL value of 6-15. The final result is that the data processing de vice knows the network path to the outside world, for example the Internet. An ICMP protocol (Internet Control Message Protocol) can be utilised in ascer 20 taining external addresses. A Record Route flag of an ICMP packet is used in the ICMP procedure, which flag requests operating systems of the devices on the network path to record in the ICMP packet's title the IP address of the transmitting router. 25 Figure 3b shows some of the connection establishment procedures 2060-2064 enabling the establishment of a VPN tunnel and utilised in step 206 in Figure 2. In Figure 3b the alternative connection establishment procedures are shown as par allel processes which are utilised simultaneously. The invention is however not limited to this embodiment, but connection establishment processes can be im 30 plemented also depending on the application in a suitable way as successive connection establishment processes. In this embodiment, even after one connec tion establishment of a VPN tunnel other connection establishment methods are not necessarily attempted to utilise. 35 The example of Figure 3b shows five possible establishing methods of a VPN tunnel. With reference 2060 the establishing of a VPN tunnel by using TCP proto col is shown. If the elements of the communication network between the home control network device and the home control network key allow connection estab- WO 2013/104823 PCT/F12013/050011 24 lishing, it is ascertained in step 2060a. If the connection cannot be established, the connection establishment is advantageously attempted again. With reference 2061 the establishing of a VPN tunnel by using UDP protocol is 5 shown. If the elements of the communication network between the home control network device and the home control network key allow connection establishing, it is ascertained in step 2061 a. If the connection cannot be established, the connec tion establishment is advantageously attempted again. 10 With reference 2062 the establishing of a VPN tunnel by using UDP port scanning described later is shown. If the elements of the communication network between the home control network device and the home control network key allow connec tion establishing, it is ascertained in step 2062a. If the connection cannot be es tablished, the connection establishment is advantageously attempted again. 15 With reference 2063 the establishing of a VPN tunnel by using ICMP procedure described later is shown. If the elements of the communication network between the home control network device and the home control network key allow connec tion establishing, it is ascertained in step 2063a. If the connection cannot be es 20 tablished, the connection establishment is advantageously attempted again. With reference 2064 the establishing of a VPN tunnel by using the TCP relay pro cedure described later is shown. Advantageously, this procedure is utilised when the communication network elements between the home control network device 25 and the home control network key do not allow establishing of a direct end-to-end VPN tunnel. Also in this procedure it is ascertained in step 2062a whether a se cure data transfer connection was successfully established between the home control network device and the home control network key. If the connection cannot be established, the connection establishment is advantageously attempted again. 30 Every connection establishment procedure 2060-2064 can provide a VPN data transfer connection between the home control network device 61 and the home control network key 42 or 42b. In step 2069, the VPN tunnel or VPN tunnels is/are chosen, that is/are used as the data transfer connection. 35 All the process steps shown in Figures 2, 3a and 3b are implemented with pro gram commands, which are performed in a suitable general-purpose or special purpose processor. The program commands are stored on a storage medium uti- WO 2013/104823 PCT/F12013/050011 25 lised by the home control network device 61 and the home control network key 42, such as memories, from which the processor can retrieve and implement them. The references to a computer-readable medium can for example also contain special components, such as programmable USB Flash memories, logic arrays 5 (FPLA), application-specific integrated circuits (ASIC) and signal processors (DSP). Example of establishing a VPN tunnel by using a UDP protocol, reference 2061, in the arrangement of Figure 1a: 10 The home control network key 42 begins the pairing-up process. It notifies the home control network server 21 that it wants to establish a data transfer connec tion to the home control network device 61 advantageously by using the UDP pro tocol. The home control network server 21 decides that the requested data trans 15 fer connection should be established with the following port numbers: - the home control network key: UDP source port 10500, UDP destination port 10501, target IP address 240.1.1.2 - the home control network device: UDP source port 10501, UDP destination port 20 10500, target IP address 240.2.1.2 The home control network server 21 reports this information to the home control network key 42 and the home control network device 61. 25 Thereafter the home control network key 42 sends the UDP packet to the address 240.1.1.2 on source port 10500 to the destination port 10501. The sent packet gets through the firewall FW2, which contains a NAT function, because outgoing traffic is not strongly restricted. The FW2 firewall 31 remembers the UDP packet as a connection for the following X seconds with the contact information 10.0.0.2, 30 240.1.1.2, 10500 and 10501. The UDP packet arrives at the FW1 firewall 51 in front of the home control net work device 61, which firewall does not allow incoming traffic and it drops the packet. The packet does not arrive at the address 10.0.0.2. 35 The home control network device 61 sends a UDP packet to address 240.2.1.2 on source port 10501 to destination port 10500. The sent UDP packet gets through the FW1 NAT firewall 51, because outgoing traffic is not restricted. The FW1 fire- WO 2013/104823 PCT/F12013/050011 26 wall 51 remembers the UDP packet as a connection for the following X seconds with the contact information 10.0.0.2, 240.2.1.2, 10501 and 10500. The UDP packet arrives at the FW2 firewall 31. The FW2 firewall 31 remembers 5 that the IP address 10.0.1.2 had established a UDP connection to address 240.1.1.2 on source port 10500 and destination port 10501. Because the UDP packet comes from said source address 240.2.1.2, on source port 10501 and to destination port 10500, the FW2 firewall 31 interprets the packet as return com munication related to the connection established by the device 10.0.1.2. The fire 10 wall FW2 thereafter performs an address change operation. It changes the target address of the UDP packet to 10.0.1.2. Thereafter the FW2 firewall 31 routes the UDP packet to address 10.0.1.2. Now the home control network key 42 receives a message from the home control network device 61. A one-way data transfer con nection from the home control network device 61 to the home control network key 15 42 now exists. Next, the home control network key 42 sends the UDP packet to the address 240.1.1.2 on source port 10500 to the destination port 10501. The UDP packet ar rives at the FW1 firewall 51. The FW1 firewall 51 remembers that the IP address 20 10.0.1.2 had established a UDP connection to address 240.2.1.2 on source port 10501 and destination port 10500. Because the UDP packet comes from said source address 240.2.1.2, on source port 10501 and to destination port 10500, the FW2 firewall 51 interprets the received packet as return communication relat ed to the connection established by the device 10.0.0.2. The FW1 firewall 51 per 25 forms an address change, i.e. changes the target address of the packet to 10.0.0.2. Thereafter the FW1 firewall 51 routes the packet to address 10.0.0.2. Now a two-way UDP connection exists between the home control network key 42 and the home control network device 61. These devices can communicate with 30 each other bidirectionally. The home control network device 61 and the home con trol network key 42 advantageously form a data link layer level VPN tunnel be tween them, using for example the OpenVPN software. The home control network device 61 advantageously bridges the created VPN 35 tunnel 55 with the house control remote network 172.17.0.0/24, reference 6, ad ministrated by it. In the same way the home control network key 42 bridges the created VPN tunnel 55 with its LAN port, so it is able to provide intranet interfaces in the network 172.17.0.0/24 on the data link layer level. After these operations WO 2013/104823 PCT/F12013/050011 27 the house control remote network 4 and the house control intranet 6 form a pri vate VPN network over the Internet 2. Example of establishing a VPN tunnel by using UDP port scanning, refer 5 ence 2062, in the arrangement of Figure 1a: The UDP port scanning can be utilised, if one element in the data transfer network changes either the source or the destination ports occasionally. The steps of the below described method differ from each other depending on the fact, whether the 10 element changing the source or destination ports occasionally is in front of the sending or the receiving member. 1. Scanning on source ports: 15 The firewall 51 in front of the home control network device 61 changes only the source address of the sent packets, the source port is not changed. The home control network device 61 begins the sending of UDP packets with the following information: source port 5000, source IP 10.0.0.2, destination IP 5.5.5.5, 20 destination ports for example between 1024 -> 1054 (30 different source ports). The data (payload) of every UDP packet includes the chosen destination port, for example 1024. By means of this it is known in the receiving end, to which port the sent packet went through the firewall 31. 25 The sending frequency of the UDP packets is advantageously 200 milliseconds. First, for example a UDP packet is sent on source port 1024, in 200 ms another UDP packet on source port 1025, etc. After the UDP packet on the last source port 1054 has been sent (after ca. 6 seconds), the home control network device 61 sends UDP packets again in the same order starting from the source port 30 1024. Thereafter also the home control network key 42 starts to send UDP packets with the following information: source IP 10.0.1.2, target IP 6.6.6.6, destination port 5000, source ports for example between 1024 -> 65535 (64511 different source 35 ports). The sending frequency of the UDP packets is advantageously 50 millisec onds. That is, first for example a UDP packet is sent on source port 1024, in 50 ms another UDP packet on source port 1025, etc. The payload of every UDP packet includes the used source port, for example 1024. This information can be WO 2013/104823 PCT/F12013/050011 28 used to recognize, which one of the used source ports changes into which source port when it passes through the NAT firewall 51. The aim is that during this step the UDP packet sent by the home control network 5 key 42 gets through the firewall 51, or the UDP packet sent by the home control network device 61 gets through the firewall 31 of the home control network key 42. When one or the other of the devices sees the UDP packet coming through, to that UDP packet is responded to the same source port as from where the UDP packet was marked to be coming from. Thereafter the establishing of the VPN 10 connection can be started. Sending of the packets goes on until the connection is made to work or the con nection establishing is cancelled. 15 2. Scanning on destination ports: The NAT firewall 31 in front of the home control network key 42 changes the source address and the source port of the sent data packets. Typically, the source port changes occasionally, for example the source port 1024 may change for ex 20 ample into the source port 16431. The home control network key 42 starts sending UDP packets with the following information: source port 5000, source IP 10.0.1.2, destination port 6.6.6.6, source ports for example between 1024 -> 1054 (30 different source ports). The data 25 (payload) of every UDP packet includes a source port, for example 1024. By means of this it is known in the receiving end, the UDP packet sent from which source port went through the firewall 31. The sending frequency of the UDP packets is advantageously 200 milliseconds. 30 First, for example, a UDP packet is sent on source port 1024, in 200 ms a UDP packet on source port 1025, etc. After the UDP packet on the last source port 1054 has been sent (after ca. 6 seconds), the home control network key 42 sends UDP packets again in the same order starting from the source port 1024. 35 Thereafter, the home control network device 61 starts sending UDP packets with the following information: source IP 10.0.0.2, destination IP 5.5.5.5, source port 5000, destination ports for example between 1024 -> 65535 (64511 different des tination ports). The sending frequency of the packets is advantageously 50 milli- WO 2013/104823 PCT/F12013/050011 29 seconds. First, a UDP packet is sent on destination port 1024, in 50 ms on desti nation port 1025 etc. The payload of every UDP packet includes the destination port used by the packet, for example 1024. This information can be used to rec ognize, which one of the used destination ports changes into which destination 5 port when it passes through the NAT firewall 31. The aim is that during this step the UDP packet sent by the home control network key 42 gets through the firewall 51 in front of the home control network device 61, or the UDP packet sent by the home control network device 61 gets through the 10 firewall 31 in the front of the home control network key 42. When one of the de vices sees the UDP packet passing through, that packet is responded to the same source port from which the packet seems to be coming. Sending of the packets continues until the connection is made to work or the con 15 nection establishing is cancelled. In both of the above-mentioned cases establishing of the VPN connection can be started as follows: 20 The port trio used with the VPN connection: - source port used by the home control network device 61 host1 real_source port). - source port transformed by the NAT firewall 51 of the home control network de vice, which is the same as the destination port (host1_translatedsourceport) 25 used by the home control network key 42 - destination port (host2_realsource port) used by the home control network key 42. The home control network device 61 opens the VPN connection: 30 - destination IP 6.6.6.6 - source port host1_real_source port - source port host2_realsource _port The home control network key 42 opens the VPN connection: 35 - destination IP 5.5.5.5 - source port host2_realsource port - destination port host1_translatedsource port WO 2013/104823 PCT/F12013/050011 30 Both NAT firewalls 31 and 51 believe that the connection was established from their own intranet, whereby the UDP connection is routed through the NAT fire walls 31 and 51. 5 Examples of establishing a VPN tunnel by using an ICMP protocol, reference 2063, in the arrangement of Figure ia: The control protocol of the IP protocol can be utilised, if the network element in the data transfer network allows communication for ICMP ECHO and ICMP ECHO 10 REPLY type packets. ICMP method 1: permanent ICMP ECHO ID: This embodiment is possible when the firewall(s) in the data transfer network(s) 15 does/do not react to TTL expired messages. The home control network key 42 sends an IP packet via router 10.0.1.1 with the following information: destination IP 6.6.6.6, source IP 10.0.1.2, TTL 1, type ICMP, ICMP type ECHO REQUEST, ID 1234, sequence 1 and the payload of the packet 20 is empty. The sent packet passes through the NAT firewall 31, whereby the source IP of the packet changes -> 5.5.5.5, the TTL of the packet changes 1 -> 0. The NAT firewall 31 remembers that with the ID number 1234 the source IP 10.0.1.2 changed into 1 25 echo request. The router in the Internet 2 (not shown in Figure 1a), the exemplary IP address of which is 3.1.1.1, receives an IP packet, the TTL of which is 0. This router replies with an "ICMP TTL time to live expired" message to the firewall 31. 30 The firewall 31 receives an "ICMP TTL time to live expired" message, but, however, does not react to it. The home control network device 61 sends an IP packet through router 10.0.0.1 35 with the following information: destination IP 5.5.5.5, source IP 10.0.0.2, TTL 255, type ICMP, ICMP type ECHO REPLY, ID 1234, Sequence 1 and the payload of the packet includes advantageously 30-1400 bytes of VPN communication.
WO 2013/104823 PCT/F12013/050011 31 The sent ICMP ECHO packet passes through the firewall 51, whereby the source IP of the packet changes -> 6.6.6.6. The ICMP packet reaches the firewall 31. The firewall 31 remembers that a request with ICMP ECHO ID number 1234 was sent earlier. The firewall 31 remembers that the sender of the request was device 5 10.0.1.2. The firewall 51 routes the packet further to address 10.0.1.2. The destination IP of the packet changes 5.5.5.5 -> 10.0.1.2. The home control network key 42 receives the ICMP ECHO packet and thus the home control network device 61 has successfully sent a packet of free-form data 10 to the home control network key 42. The home control network key 42 continues sending ICMP ECHO REQUEST packets, and the home control network device 61 continues sending ICMP ECHO REPLY messages, respectively. The home control network key 42 and the home 15 control network device 61 have formed a one-way data transfer connection between themselves. Next, the home control network key 42 and the home control network device 61 form also another, reverse ICMP connection. The connection is established as 20 described above. Only the direction of the connection establishment changes. In the end of the connection establishment process the home control network device 61 receives the ICMP packet sent by the home control network key 42, the payload of which packet includes advantageously 30-1400 bytes of VPN communication. 25 The home control network key 42 and the home control network device 61 continue sending requests to each other as described above. Thus, a two-way connection now exists between the home control network key 42 and the home control network device 61. The ECHO REPLY messages comprise TLS-encrypted 30 communication of the VPN connection, so that a direct VPN connection penetrating the NAT firewalls 31 and 51 has been successfully formed between the home control network key 42 and the home control network device 61. ICMP method 2: variable ICMP ECHO ID: 35 The data transfer connection may have a network element, for example a firewall that handles the TTL messages (Time to Live expired) in that way that a new ICMP ECHO REQUEST is necessary, so that an ICMP ECHO REPLY would go WO 2013/104823 PCT/F12013/050011 32 through. Thereby every "TTL expired" message "eats" the place of one ICMP ECHO REPLY packet. When this kind of a network element sees a "TTL expired" message, it does not route an "ICMP ECHO REPLY" message to the destination any more. 5 The difference of this method to the case of a permanent ICMP ECHO ID is that an ICMP ECHO ID is different in every ICMP ECHO REQUEST and ICMP ECHO REPLY packet pair. Sending of an ICMP ECHO REQUEST and ICMP ECHO REPLY packet pair takes place synchronized on the basis of time so that ICMP 10 ECHO REQUEST and ICMP ECHO REPLY are sent substantially simultaneously. Thereby the ICMP ECHO REQUEST gets out of the NAT firewall of the sending member before the ICMP ECHO REPLY of the other device gets onto the same firewall. 15 Advantageously, a great value is used as the TTL value, so that the ICMP ECHO REQUEST packet would stay on the way as long as possible before the firewall receives either a "TTL expired" or a "wrong" "ICMP ECHO REPLY from the firewall of the other end. 20 In the following, an example of this IMPC ECHO method in the case of Figure 1 a: The home control network key 42 sends an IP packet via router 10.0.0.1 with the following information: destination IP 6.6.6.6, source IP 10.0.1.2, TTL 255, type ICMP, ICMP type ECHO REQUEST, ID 1000, Sequence 1 and the payload of the 25 packet is empty. Simultaneously, the home control network device 61 sends an IP packet with the following information: destination IP 5.5.5.5, source IP 10.0.0.2, TTL 255, type ICMP, ICMP type ECHO REPLY, ID 1000, Sequence 1. The payload of the packet 30 includes in its beginning the number "2000", whereupon follows the requested sending frequency (for example 500 ms) of the ICMP ECHO REQUEST, and thereafter free-formed VPN communication, advantageously 30-1400 bytes. The ICMP ECHO REQUEST packet sent by the home control network key 42 35 passes through the NAT firewall 31. Thereby the source IP of the packet changes -> 5.5.5.5. The NAT firewall 31 remembers that with the ID number 1000 the source IP 10.0.0.2 became one ICMP ECHO REQUEST WO 2013/104823 PCT/F12013/050011 33 Simultaneously, the ICMP ECHO REQUEST packet sent by the home control network device 61 passes through the NAT firewall 51. Thereby the source IP of the packet changes -> 6.6.6.6. The NAT firewall 51 remembers that with the ID number 1000 the source IP 10.0.0.2 became ICMP ECHO REQUEST. 5 The sent ICMP ECHO REQUEST packets "pass" each other in the Internet 2, that is, both packets are on the way in the network of the operator at the same time. The ICMP ECHO REQUEST packet arrives at the firewall 51 and the firewall 51 10 replies thereto. The result of the reply is not significant, because the ICMP ECHO REPLY sent by the home control network device 61 has been sent before the ICMP ECHO REPLY packet sent by the firewall 51. It is also not important if the firewall 51 does not reply to the ICMP ECHO REQUES packet. 15 The ICMP ECHO REPLY packet sent by the home control network device 61 reaches the firewall 31. The firewall 31 remembers that an ICMP ECHO packet with ID number 1000 was sent earlier. The firewall 31 remembers that the sender of the request was device 10.0.1.2. The firewall 31 routes the packet further to address 10.0.1.2 by changing the destination IP of the packet 5.5.5.5 -> 10.0.1.2. 20 The home control network key 42 receives the ICMP packet and thus the home control network device 61 has successfully sent an ICMP packet of free-form data to the home control network key 42. 25 Next, the home control network key 42 and the home control network device 61 form also another, reverse ICMP connection. The connection is established as described above. Only the direction of the connection establishment changes. In the end of the connection establishing process the home control network key 42 receives a packet, the payload of which includes VPN communication 30 advantageously of 30-1400 bytes. The home control network device 61 and the home control network key 42 contin ue sending ICMP ECHO REQUEST and ICMP ECHO REPLY packet pairs so that every ICMP packet pair has a different ECHO ID. Thus, the ICMP ECHO REPLY 35 or TTL time to live exceeded messages sent by the firewalls 31 and 51 do not im pede the communication. The home control network device 61 and the home control network key 42 agree WO 2013/104823 PCT/F12013/050011 34 among themselves on ECHO ID numbers and sending frequency advantageously first by means of a separate home control network server 21 and upon establishment of the data transfer connection directly to each other in the beginning of the payload of the ICMP ECHO REPLY packets. In the beginning of 5 the ICMP REPLY packets, in every packet the previous ECHO REQUEST ID, sent by the respective device, and the sending frequency requested by the device for the ECHO REQUEST packets, is notified. Thus, both devices know which ECHO ID needs to be sent in the next ECHO REQUEST packet and when the next ECHO REQUEST needs to be sent. If for example in the ECHO REPLY packet the 10 requested sending frequency is 500 ms, the device sends its ECHO REQUEST packet always when the time from the moment of establishment of the connection in milliseconds is divisible by 500. Examples of establishing a VPN tunnel by using a TCP protocol, reference 15 2064, in the arrangement of Figure Ia: An assisted TCP relay connection functions in sense of data security correspondingly to any other connection, for example a normal direct UDP connection between two devices. The VPN connection is not opened with a used 20 TCP relay server, but the encrypting takes place in the terminal devices establishing the connection. Breaking into the TCP relay server cannot break the established VPN connection, and the home control network key according to the invention cannot be cheated to connect to a wrong device. 25 Example of a TCP relay connection establishment: The public IP address of the home control network key 42 is 5.5.5.5, the public IP address of the home control network device 61 is 6.6.6.6, and the public IP address of the TCP relay server (home control network server 21) is 7.7.7.7. 30 The home control network key 42 makes a TCP connection to address 7.7.7.7 and to its port 443. The TCP relay server sees the requested connection and accepts it. The TCP handshaking takes place and the TCP channel is opened. The home control network key 42 sends unique information of the connection along the TCP 35 channel (e.g. Connection ID) to the TCP relay server. The TCP relay server receives the information and by means of this can later link the received connection to the right home control network device 61.
WO 2013/104823 PCT/F12013/050011 35 The home control network device 61 makes a TCP connection to address 7.7.7.7, to port 443. The TCP relay server sees the requested connection and accepts it. The TCP handshaking takes place and the TCP channel is opened. The home 5 control network device 61 sends unique information of the connection along the TCP channel (e.g. Connection ID) to the TCP relay server. The TCP relay server receives the information and by means of this the TCP relay server knows later, to which home control network key 42 the home control 10 network device 61 is to be connected. The TCP relay server starts transmitting messages between the home control network key 42 and the home control network device 61 between the TCP connections. The TCP relay server reads data from the TCP connection coming 15 from the home control network key 42 and transmits the data as such to the TCP connection of the home control network device 61. Accordingly, the TCP relay server reads data from the connection of the home control network device 61 and transmits the read data as such to the TCP connection of the home control network key 42. Data transmission is continued bidirectionally until the other TCP 20 connection is interrupted. When the other TCP connection is interrupted, also the other TCP connection is interrupted by the TCP relay server. Figure 4 shows the functional main parts of the home control network device 61 according to the invention. The home control network device 61 has a power 25 source 621. It can be an accumulator or a power source based on mains current. All the electric components of the home control network device get their operating voltage from the power source 621. The home control network device 61 has one or more processors 622. The pro 30 cessor or processor means can comprise an arithmetic logic unit, a group of dif ferent registers and control circuits. A data storing arrangement 623, such as a memory unit or memory means, whereon computer-readable information or pro grams or user information can be stored, has been connected to the processor means. The memory means 623 typically contain memory units, which allow both 35 reading and writing functions (Random Access Memory, RAM), and memory units containing non-volatile memory, from which data can only be read (Read Only Memory, ROM). The device register, certificates to be utilised in the establishment of the VPN connection, the current network path information and all the programs WO 2013/104823 PCT/F12013/050011 36 needed for the operation of the home control network device 61 are advanta geously stored in the memory means. Some examples of programs stored in the memory of the home control network 5 device 61 are an operating system (e.g. Linux), TCP/IP programs, a VPN program (e.g. OpenVPN), a DHCP client device/server program (e.g. ISC DHCP), a DNS server program (e.g. dnsmasq), a database program (e.g. SQLite), a remote con trol program (e.g. OpenSSH), a certificate management/confirmation program (e.g. GPG) and a user interface library (e.g. LuCI). 10 The home control network device 61 also comprises interface elements, which comprise an input/output or input/output means 624, 625, 626, 627 and 628 for receiving or sending information. The information received with the input means is transferred to be processed by the processor means 622 of the home control net 15 work device 61. The interface elements of the home control network device trans fer information either to the data transfer network or to external data processing devices. The interface elements of the home control network device 61 are advan tageously a WAN port 624, one or more LAN ports 625, an antenna port 626, a USB port 627 and a control port 628. The pairing of the home control network de 20 vice 61 and the home control network key 42 or 41 c can advantageously be done for example via the USB port 627. It is obvious to someone skilled in the art that the functions of the home control network device 61 can be integrated as a part of a computerised or house engi 25 neering device, which has a sufficient processor and memory capacity and con necting means for connecting various technical means thereto either with a wired data transfer connection or a wireless data transfer connection. This computer ised device, in which the functions of the home control network device are inte grated, is connected to some data transfer network 5, from which there is access 30 to the public Internet. Figure 5a shows the functional main parts of the home control network key 42 ac cording to the invention. The home control network device 42 has a power source 421. It can be an accumulator or a power source based on mains current. All the 35 electric components of the home control network device get their operating volt age from the power source 421.
WO 2013/104823 PCT/F12013/050011 37 The home control network key 42 may comprise one or several processors 422. The processor or processor means can comprise an arithmetic logic unit, a group of different registers and control circuits. A data storing arrangement 423, such as a memory unit or memory means, whereon computer-readable information or pro 5 grams or user information can be stored, has been connected to the processor means. The memory means 423 typically contain memory units, which allow both reading and writing functions (Random Access Memory, RAM), and memory units containing non-volatile memory, from which data can only be read (Read Only Memory, ROM). The certificates to be utilised in the establishment of the VPN 10 connection, the current network path information and all the programs needed for the operation of the home control network device 42 are advantageously stored in the memory means. Some examples of programs stored in the memory of the home control network 15 key 42 are an operating system (e.g. Linux), TCP/IP programs, a VPN program (e.g. OpenVPN), a DHCP client device/server program (e.g. ISC DHCP), a DNS server program (e.g. dnsmasq), a database program (e.g. SQLite), a remote con trol program (e.g. OpenSSH), a certificate management/confirmation program (e.g. GPG) and a user interface library (e.g. LuCI). 20 The home control network key 42 also comprises interface elements, which com prise an input/output or input/output means 424, 425, 426, 427 and 428 for receiv ing or sending information. The information received with the input means is transferred to be processed by the processor means 422 of the home control net 25 work key 42. The interface elements of the home control network device transfer information either to the data transfer network or to external data processing de vices. The interface elements of the home control network device 42 are advanta geously a WAN port 424, one or more LAN ports 425, an antenna port 426, a USB port 427 and a control port 428. 30 Figure 5b shows the functional main parts of a home control network key 42b ac cording to a second embodiment of the invention. The home control network key 42b according to this embodiment may comprise one or several cryptoprocessors 422b. The processor or processor means can comprise an arithmetic logic unit, a 35 group of different registers and control circuits. A cryptoprocessor 422b comprises advantageously an internal memory unit, in which an individual private crypto graphic key has been stored.
WO 2013/104823 PCT/F12013/050011 38 A data storing arrangement 423b, such as a Flash memory unit or memory means, whereon computer-readable information or programs or user information can be stored, has been connected to the processor means. The memory means 423b typically contain memory units, which allow both reading and writing func 5 tions (Random Access Memory, RAM), and memory units containing non-volatile memory, from which data can only be read (Read Only Memory, ROM). The iden tification information of the home control network key 42b, its current network path, The certificates to be utilised in the establishment of the VPN connection, the current network path information the identification information of the home 10 control network device 61 functioning as its device pairs and all the programs needed for the operation of the home control network key 42b are advantageously stored in the memory means. Some examples of programs stored in the memory of the home control network key 42b are an operating system (e.g. Linux), TCP/IP programs, a VPN program 15 (e.g. OpenVPN), a DHCP client device/server program (e.g. ISC DHCP), a data base program (e.g. SQLite), a certificate management/confirmation program (e.g. GPG) and a user interface library (e.g. LuCI). The home control network key 42 also comprises interface elements, which com prise an input/output or input/output means 426b for receiving or sending infor 20 mation. The information received with the input means is transferred to be pro cessed by the processor means 422b of the home control network key 42b. The interface elements of the home control network device are advantageously used to transfer information from the memory 423b of the home control network key ei ther to an external data processing device 41 c or to the home control network de 25 vice 61. Correspondingly information or commands can be received via the inter face elements for example from the data processing device, to which the home control network key 42b is connected. With regards to their access right levels there are at least two levels of the above described home control network keys 42 or 42b, for example administrator and 30 basic user level key devices. A higher access right level key device user/owner (e.g. an administrator) has control right to all control targets of home control net work key users on a lower level (such as basic users). An owner of a lower level key device access right level does on the other hand not have access to any other higher access right level control target than his own targets.
WO 2013/104823 PCT/F12013/050011 39 Figure 6 shows the functional main parts of the home control network server 21. The home control network server 21 functions advantageously also as a TCP re lay server. The home control network server 21 comprises a power source 611. It can be an accumulator or a power source based on mains current. All the electric 5 components of the home control network server 21 get their operating voltage from the power source 611. The home control network server 21 has one or more processors 212. The pro cessor or processor means can comprise an arithmetic logic unit, a group of dif ferent registers and control circuits. A data storing arrangement 613, such as a 10 memory unit or memory means, whereon computer-readable information or pro grams or user information can be stored, has been connected to the processor means. The memory means 613 typically contain memory units, which allow both reading and writing functions (Random Access Memory, RAM), and memory units containing non-volatile memory, from which data can only be read (Read Only 15 Memory, ROM). The identification information of the device pairs in the remote control system (Tosibox register), the current network path information of each device pair, all the programs needed for establishing the VPN data transfer con nection to be established between the device pairs and the Tosibox database are advantageously stored in the memory means. 20 Some examples of programs stored in the memory of the home control network server 21 are an operating system (e.g. Linux), TCP/IP programs, a DHCP serv er/client device program (e.g. ISC DHCP), a DNS server program (e.g. bind), a database program (e.g. SQLite), a certificate management/confirmation program (e.g. GPG) and a user interface library (e.g. LuCI). 25 The home control network server 21 also comprises interface elements, which comprise an input/output or input/output means 614 for receiving or sending in formation. The information received with the input means is transferred to be pro cessed by the processor means 612 of the home control network device 21. The interface elements of the home control network server transfer information either 30 to the data transfer network or to external data processing devices. The interface element of the home control network server 21 is advantageously a WAN port 614. The home control network server 21 advantageously also comprises a user inter face (not shown in Figure 6), which comprises means for receiving information WO 2013/104823 PCT/F12013/050011 40 from the server 21 user. The user interface can comprise a keyboard, a touch screen, a microphone and a speaker. Figure 7 shows the data link layers (Tosibox layers) utilised in the data transfer between the home control network device 61, home control network key 42, 42b 5 and home control network server 21. The physical Tosibox layer comprises alternatives for establishing a physical data transfer connection between two devices participating in the remote-controlling. A data transfer connection can be established, for example, by coupling the devices at their Ethernet ports to the local Ethernet network, which has connection to the 10 Internet. Alternatively, the data transfer connection can be established into the lo cal WLAN network, from which there is a connection to the Internet. The third al ternative is to form a 2G or 3G data transfer connection. In this embodiment, a terminal device establishing a 2G or 3G connection is connected to the USB port of the home control network device and/or the home control network key. 15 The Tosibox data link layer comprises connection establishment procedures that can be utilised in a packet-coupled with VPN data transfer connection. Alternative or parallel connection establishment procedures include a direct TCP data trans fer connection between the members, a direct UDP data transfer connection be tween the members, a data transfer connection established by using port scan 20 ning, a data transfer connection based on ICMP ECHO messages between the members, or a relayed data transfer connection established through the home control network server (TCP relay member). The VPN encrypting layer comprises the encrypting procedures (individual, pri vate cryptographic key and a public cryptographic key of the home control net 25 work key) known by the home control network device 61 and the encrypting pro cedures (individual, private cryptographic key and the public key of the home con trol network device) known by the home control network key 42, 42b. With these encrypting procedures the home control network device 61 and the home control network key 42, 42b are able to establish a secure VPN data transfer connection 30 by using a PKI encrypting procedure (Public Key Infrastructure). Some procedures utilised in establishing of the VPN data transfer connection of the remote control system according to the invention have been described above. Further, advantageous embodiments of components implementing these proce dures in the remote control system are described. The invention is not limited to WO 2013/104823 PCT/F12013/050011 41 the solutions described above, but the inventive idea can be applied in numerous ways within the scope of the claims.

权利要求:
Claims (16)
[1] 1. A method for providing a virtual private network (55, VPN) between a first network terminal (42, 42b) and a second network terminal (61) of the actuators of the remote control system in a property, characterized in that 5 - both the first network terminal (42, 42b) and the second network terminal (61) that form a predetermined network terminal pair, the members of which are al lowed to communicate only with each other, send at times a poll to the home con trol network server (21), in which it is asked whether the other device of the de vice pair is connected to the data transfer network, and if it is, then 10 - both the first network terminal (42, 42b) and the second network terminal (61) make a connection (201) to the home control network server (21) in order to es tablish a virtual private network and request (204) the routing information from the home control network server (21) in order to establish an end-to-end data transfer connection between said network terminals 15 - the home control network server (21) sends (205) both to the first network ter minal (42, 42b) and the second network terminal (61) the requested routing infor mation (205) after it has checked that the network terminals (42, 42b, 61) are the predetermined network terminal pair, and that - the first network terminal (42, 42b) and the second network terminal (61) start 20 with several known establishing methods of a virtual private network an establish ing process of an end-to-end data transfer connection in order to provide at least one virtual private network (55).
[2] 2. The remote control method according to claim 1, characterized in that the 25 virtual private network is established as a direct TCP data transfer connection be tween the network terminals (2060, 2060a), as a direct UDP data transfer connec tion between the network terminals (2061, 2061a), by using UDP port scanning between the network terminals (2062, 2062a), by utilising ICMP ECHO messages of the IP control protocol (2063, 2063a) or with a TCP data transfer connection 30 (2064, 2064a) relayed via the home control network server (21).
[3] 3. The method according to claim 2, characterized in that at least the relayed virtual TCP private network is released, if the virtual private network (55) has been established also with another method of establishing a virtual private net 35 work.
[4] 4. A home control network key (42, 42b) for actuators in a property, comprising WO 2013/104823 PCT/F12013/050011 43 network interface elements, which comprise input/output means (424, 425, 426, 426b, 427, 428) for network interfaces (3, 4) - a processor (422, 422b) and - a memory (423, 423b), which contains computer program code 5 characterized in that the processor, the memory and the computer program code stored therein are configured to - send at times a poll to a home control network server (21), in which it is asked whether a home control network device (61) predetermined to be a network termi nal pair of the home control network key (42, 42b), with which home control net 10 work device the home control network key (42, 42b) is only allowed to communi cate, is connected to the data transfer network, and if it is, then - make a connection (201) to the home control network server (21) and to request (204) the routing information of the home control network device (61) from the home control network server (21) in order to establish a virtual private network to 15 the home control network device (61) - receive the routing information of the home control network device (61) from the home control network server (21) and - start with several known establishing methods of a virtual private network an es tablishing process of an end-to-end data transfer connection in order to provide at 20 least one virtual private network (55) with the home control network device (61).
[5] 5. The home control network key according to claim 4, characterized in that it is configured to establish a virtual private network as a direct TCP data transfer connection (2060, 2060a) to the home control network device (61), as a direct 25 UDP data transfer connection (2061, 2061a) to the home control network device (61), by using UDP port scanning (2062, 2062a) with the home control network device (61), by utilising ICMP ECHO messages of the IP control protocol (2063, 2063a) with the home control network device (61) or to establish a TCP data transfer connection (2064, 2064a) relayed via the home control network server 30 (21) to the home control network device (61).
[6] 6. The home control network key according to claim 5, characterized in that it is configured to release at least the relayed virtual TCP private network, if the vir tual private network (55) has been established also with another method of estab 35 lishing a virtual private network.
[7] 7. A home control network device (61) for actuators in a property, comprising WO 2013/104823 PCT/F12013/050011 44 - network interface elements, which comprise input/output means (624, 625, 626, 627, 628) for network interface (5) - a processor (622) and - a memory (623), which contains computer program code 5 characterized in that the processor, the memory and the computer program code stored therein are configured to - send at times a poll to a home control network server (21), in which it is asked whether a home control network key (42, 42b) predetermined to be a network ter minal pair of the home control network device (61), with which home control net 10 work key the home control network device (61) is only allowed to communicate, is connected to the data transfer network, and if it is, - make a connection (201) to the home control network server (21) and to request (204) the routing information of the home control network key (42, 42b) from the home control network server (21) in order to establish a virtual private network to 15 the home control network key (42, 42b) - receive the routing information of the home control network key (42, 42b) from the home control network server (21) and - start with several known establishing methods of a virtual private network an es tablishing process of an end-to-end data transfer connection in order to provide at 20 least one virtual private network (55) with the home control network key (42, 42b).
[8] 8. The home control network device according to claim 7, characterized in that it is configured to establish a virtual private network as a direct TCP data transfer connection (2060, 2060a) to the home control network key (42, 42b), as a direct 25 UDP data transfer connection (2061, 2061a) to the home control network key (42, 42b), by using UDP port scanning (2062, 2062a) with the home control network key (42, 42b), by utilising ICMP ECHO messages of the IP control protocol (2063, 2063a) with the home control network key (42, 42b) or to establish a TCP data transfer connection (2064, 2064a) relayed via the home control network server 30 (21) to the home control network key (42, 42b).
[9] 9. The home control network device according to claim 8, characterized in that it is configured to release at least the relayed virtual TCP private network, if the virtual private network (55) has been established also with another method of es 35 tablishing a virtual private network.
[10] 10. A home control network server (21), comprising - network interface elements, which comprise input/output means (614) WO 2013/104823 PCT/F12013/050011 45 - a processor (612) and - a memory (613), which contains computer program code, characterized in that the processor, the memory and the computer program code stored therein are 5 configured to - store in the memory of the home control network server an identification infor mation of a network terminal pair (42, 42b, 61) formed by two network terminals, used for remote-controlling of a property - receive from the network terminal pair (42, 42b, 61) the network path information 10 determined by them - receive from the first network terminal (42, 42a) the routing information request of its network terminal pair - check, which is the other network terminal (61) functioning as the predetermined network terminal pair of the first network terminal that made the routing infor 15 mation request, with which second network terminal the first network terminal (42, 42a) is only allowed to communicate - send the routing information of the network terminal pair both to the first network terminal (42, 42a) and the second network terminal (61), if they both are connect ed to the data transfer network 20 - receive cyberspace information in use in connection with the network terminal pair (42, 42b, 61) and to send the allowed cyberspace information to the home control network device (61) and - release the data transfer connection to the network terminal pair (42, 42a, 61), when at least one direct virtual private network (55) has been successfully estab 25 lished between the network terminal pair (42, 42a, 61).
[11] 11. A computer program comprising computer program code means stored on a computer-readable storage means for providing home control network device functions, comprising code means for determining the routing information from a 30 home control network key (42, 42b) to the Internet (2), characterised in that the computer program further comprises: - code means for sending at times a poll to a home control network server (21), in which it is asked whether a home control device (61) with which the home control network key (42, 42a) forms a predetermined terminal pair, the members of which 35 are allowed to communicate only with each other, is connected to the data trans fer network, and if it is, then - code means for making a connection (201) to the home control network server (21) and for requesting (204) the routing information of the home control network WO 2013/104823 PCT/F12013/050011 46 device (61) from the home control network server (21) in order to establish a vir tual private network to the home control network device (61) - code means for receiving the routing information of the home control network device (61) from the home control network server (21) and 5 - code means for starting with several known establishing methods of a virtual private network an establishing process of an end-to-end data transfer connection in order to provide at least one virtual private network (55) with the home control network device (61). 10
[12] 12. The computer program according to claim 11, characterized in that it further comprises code means which is configured to establish a virtual private network as a direct TCP data transfer connection (2060, 2060a) to the home control net work device (61), as a direct UDP data transfer connection (2061, 2061a) to the home control network device (61), by using UDP port scanning (2062, 2062a) with 15 the home control network device (61), by utilising ICMP ECHO messages of the IP control protocol (2063, 2063a) with the home control network device (61) or to es tablish a TCP data transfer connection (2064, 2064a) relayed via the home con trol network server (21) to the home control network device (61). 20
[13] 13. The computer program according to claim 12, characterized in that it also comprises code means which is configured to release at least the relayed virtual TCP private network, if the virtual private network (55) has been established also with another method of establishing a virtual private network. 25
[14] 14. A computer program comprising computer program code means stored on a computer-readable storage means for providing home control network device functions, comprising code means for determining the routing information from a home control network device (61) to the Internet (2), characterised in that the computer program further comprises: 30 - code means for sending at times a poll to a home control network server (21), in which it is asked whether a home control key (42, 42b) with which the home con trol network device (61) forms a predetermined terminal pair, the members of which are allowed to communicate only with each other, is connected to the data transfer network, and if it is, 35 - code means for making a connection (201) to the home control network server (21) and to request (204) the routing information of the home control network key (42, 42b) from the home control network server (21) in order to establish a virtual private network to the home control network key (42, 42b) WO 2013/104823 PCT/F12013/050011 47 - code means for receiving the routing information of the home control network key (42, 42b) from the home control network server (21) and - code means for starting with several known establishing methods of a virtual private network an establishing process of an end-to-end data transfer connection 5 in order to provide at least one virtual private network (55) with the home control network key (42, 42b).
[15] 15. The computer program according to claim 14, characterized in that it further comprises code means which is configured to establish a virtual private network 10 as a direct TCP data transfer connection (2060, 2060a) to the home control net work key (42, 42b), as a direct UDP data transfer connection (2061, 2061 a) to the home control network key (42, 42b), by using UDP port scanning (2062, 2062a) with the home control network key (42, 42b), by utilising ICMP ECHO messages of the IP control protocol (2063, 2063a) with the home control network key (42, 15 42b) or for establishing a TCP data transfer connection (2064, 2064a) relayed via the home control network server (21) to the home control network key (42, 42b).
[16] 16. The computer program according to claim 15, characterized in that it also comprises code means which is configured to release at least the relayed virtual 20 TCP private network, if the virtual private network (55) has been established also with 'another method of establishing a virtual private network.

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法律状态:
2015-05-21| FGA| Letters patent sealed or granted (standard patent)|

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FI20125022A|FI125972B|2012-01-09|2012-01-09|Equipment arrangement and method for creating a data transmission network for remote property management|

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FI20125022||2012-01-09||

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PCT/FI2013/050011|WO2013104823A2|2012-01-09|2013-01-07|Device arrangement and method for implementing a data transfer network used in remote control of properties|

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