WO2014042291A1 - 방화벽 기능을 가진 보안 이동통신 중계기 - Google Patents
방화벽 기능을 가진 보안 이동통신 중계기 Download PDFInfo
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- WO2014042291A1 WO2014042291A1 PCT/KR2012/007294 KR2012007294W WO2014042291A1 WO 2014042291 A1 WO2014042291 A1 WO 2014042291A1 KR 2012007294 W KR2012007294 W KR 2012007294W WO 2014042291 A1 WO2014042291 A1 WO 2014042291A1
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- WIPO (PCT)
- Prior art keywords
- terminal
- mobile communication
- security policy
- firewall
- packet data
- Prior art date
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- 238000010295 mobile communication Methods 0.000 title claims abstract description 79
- 238000000034 method Methods 0.000 claims description 23
- 238000004891 communication Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/02—Network architectures or network communication protocols for network security for separating internal from external traffic, e.g. firewalls
- H04L63/0227—Filtering policies
- H04L63/0245—Filtering by information in the payload
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/22—Arrangements for preventing the taking of data from a data transmission channel without authorisation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/02—Network architectures or network communication protocols for network security for separating internal from external traffic, e.g. firewalls
- H04L63/0209—Architectural arrangements, e.g. perimeter networks or demilitarized zones
- H04L63/0218—Distributed architectures, e.g. distributed firewalls
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/20—Network architectures or network communication protocols for network security for managing network security; network security policies in general
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/08—Access security
- H04W12/088—Access security using filters or firewalls
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/60—Context-dependent security
- H04W12/69—Identity-dependent
- H04W12/71—Hardware identity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/60—Context-dependent security
- H04W12/69—Identity-dependent
- H04W12/72—Subscriber identity
Definitions
- the present invention relates to a mobile communication repeater, and more particularly, to a small mobile communication repeater.
- a mobile communication repeater used to provide a mobile communication service at such a shadow position mainly in an indoor base station where the signal of an external base station is difficult to receive receives a signal of a base station and emits a signal of low power permitted by law or mobile communication. It serves as a simple signal relay that receives the signal from the terminal and delivers it to the base station.
- smartphones that are constantly connected to the communication network and capable of high-level office work are rapidly spreading, which can quickly leak confidential information through smartphones and mobile communication services.
- the possibility of penetration into the network cannot be ruled out.
- An object of the present invention is to provide a secure mobile communication repeater having a firewall function that can provide a security function while relaying a signal between an indoor mobile communication terminal and an external base station.
- a baseband processor extracting baseband data by baseband modulating and demodulating the mobile communication signal transmitted between the terminal and the mobile communication network base station;
- a storage unit which stores setting information of the security policy
- a firewall function unit for determining whether a security policy is violated with respect to packet data included in the baseband data according to an instruction of the controller.
- the storage unit further stores firewall selection information that specifies whether a violation of a security policy is to be performed through the firewall function unit or an external firewall facility.
- the controller may be operable to provide the packet data to at least one of the firewall function unit or an external firewall facility according to the firewall selection information.
- the controller when the security policy is set to not allow the wireless packet data service, transmits a service option negotiation rejection signal to the terminal when the baseband data received from the terminal includes a service option negotiation request signal. Operate to transmit.
- the controller may be operable to transmit a PDP context release request signal to the terminal.
- control unit stores the identification number of the terminal when the terminal requests a service option negotiation, and if it is determined that the packet data violates a security policy, the controller transmits the identification number to the terminal based on the stored identification number of the terminal. And transmit a PDP context release request signal.
- the controller may be operable to transmit a PDP context release request signal to the mobile communication network base station.
- the security repeater In the secure mobile communication relay method using a security repeater for relaying a mobile communication signal between a terminal and a mobile communication network base station according to another aspect of the present invention, the security repeater,
- the secure mobile communication relay method
- the method may further include providing the packet data to at least one of the firewall function unit and an external firewall facility according to the firewall selection information.
- the secure mobile communication relay method
- the method may further include transmitting a service option negotiation rejection signal to the terminal when the baseband data received from the terminal includes a service option negotiation request signal. .
- the secure mobile communication relay method
- the method may further include transmitting a PDP context release request signal to the terminal.
- the secure mobile communication relay method
- the method may further include transmitting a PDP context release request signal to the terminal based on the stored identification number of the terminal.
- the secure mobile communication relay method
- the method may further include transmitting a PDP context release request signal to the mobile communication network base station.
- the secure mobile communication repeater of the present invention it is possible to control the start and stop of a service and the relaying of a packet when a wireless data service is provided to a mobile communication terminal in a region requiring security.
- the secure mobile communication repeater of the present invention it is possible to provide security at the time of wireless data service by using an existing firewall facility.
- the secure mobile communication repeater of the present invention when there is an activity that violates the security policy, it is possible to reduce the communication load by transmitting a connection release message to the mobile communication terminal and the server side in communication.
- the secure mobile communication repeater of the present invention since it is possible to provide security by using the existing protocol as it is, tethering attempted in a general mobile phone terminal, a smart phone, or even a PC, commonly called a feature phone. In the case of tethering, a fixed security policy can be applied.
- FIG. 1 is a conceptual diagram illustrating a mobile communication system using a secure mobile communication repeater having a firewall function according to an embodiment of the present invention.
- FIG. 2 is a block diagram schematically illustrating a secure mobile communication repeater having a firewall function according to an embodiment of the present invention.
- FIG. 3 is a flowchart illustrating a message flow of a secure mobile communication repeater having a firewall function according to an embodiment of the present invention.
- FIG. 1 is a conceptual diagram illustrating a mobile communication system using a secure mobile communication repeater having a firewall function according to an embodiment of the present invention.
- the mobile communication system 10 includes a mobile communication terminal 11, a secure mobile communication repeater 12, an external firewall facility 13, a firewall management server 14, an external mobile communication repeater 15, It can be described as the base station 16, the application server 17.
- a secure mobile communication repeater 12 having a firewall function as a mobile communication service in a place where a security service is required such as an office, but the security repeater so that the mobile communication service is provided only through the security repeater 12 Field 12 is installed.
- the mobile communication terminal 11 automatically selects a base station having the strongest strength of the received mobile communication radio wave, if the security relay 12 of the security relay 12 is larger than the signal of the base station 16 outside the building in the office, If the signal is stronger, the mobile communication terminal 11 is only connected to the security repeater 12.
- the mobile communication terminal 11 may include a smart phone, a general mobile phone, a tablet PC, a PDA, and the like, and a computer that intends to use a wireless data service through tethering with the terminal may also be included in this category.
- the mobile communication terminal 11 is connected to the external mobile communication repeater 15 and the base station 16 via the security repeater 12, and through the mobile communication packet switching network represented by the base station 16, a substantial Internet such as a web service.
- the application server 17 providing the service can be connected.
- the external mobile communication repeater 15 serves to simply connect the security repeater 12 which is responsible for signal relaying indoors and the external base station 16.
- the security repeater 12 and the external mobile communication repeater 15 may be connected by wire, for example, by an optical cable.
- the external firewall facility 13 is an optional component, and the security repeater 12 may apply at least one of an internal firewall function unit and an external firewall facility 13 to provide a firewall function by itself, to apply a security policy. have.
- the firewall management server 14 may set and manage a security policy of the firewall function unit inside the external firewall facility 13 or the security repeater 12.
- the security repeater 12 extracts and stores the terminal identification information and the IP information from the information exchanged by the mobile communication terminal 11 to access the application server 17 via the mobile communication base station 16, and stores the mobile communication terminal.
- the wireless data packet transmission attempted by (11) the wireless data packet transmission itself is rejected from the beginning according to the security policy set by the administrator through the firewall management server 14, or a built-in firewall function or an external firewall facility ( 13), the specific security policy according to the transmitted wireless data packet can be executed.
- the security repeater 12 not only rejects the transmission of the packet when the wireless data packet violates the security policy, but also requests a disconnection from the mobile communication terminal 11 and the base station 16, respectively. For example, the cancellation of the PDP context information may be sent to terminate the wireless packet data service.
- FIG. 2 is a block diagram schematically illustrating a secure mobile communication repeater having a firewall function according to an embodiment of the present invention.
- the secure mobile communication repeater 12 includes an antenna 121, a transceiver 122, a baseband processor 123, a controller 124, a relay 125, a storage 126, The firewall function unit 127 and the input / output unit 128 may be included.
- a mobile communication signal is received between the terminal 11 connected to the security repeater 12 through the antenna 121 and the transceiver 122, and is down-modulated into a baseband signal, and then the baseband processor 123. Is handled either as voice communication or data communication.
- the data packet is transmitted from the baseband processor 123 to the external repeater 15 via the control unit 124 and the relay unit 125 and to the application server 17 via the base station 16.
- the relay unit 125 may be implemented as an optical input / output port if the security repeater 12 is connected to the external repeater 15 by an optical cable. If the security repeater 12 is wirelessly connected to the external repeater 15, the repeater 125 may be implemented as a wireless transceiver, where the wireless transceiver is implemented separately from the antenna 121 and the transceiver 122. It may be, or may be designed to share some part.
- the control unit 124 applies the security policy to the data packet by referring to the security policy setting information and the firewall selection information stored in the storage unit 126, and the internal firewall function unit 127 or the external firewall facility 13 It can be decided whether any of the above will determine whether the security policy is violated.
- control unit 124 analyzes the data packet transmitted from the mobile communication terminal 11 to identify the terminal 11 identification information (for example, telephone number, ENS, IMEI, SIM, MSN, PIN, etc.) and the terminal ( IP information given to 11), and also IP information of the application server 17 which is the destination of the packet, are respectively obtained and stored in the storage unit 126.
- terminal 11 identification information for example, telephone number, ENS, IMEI, SIM, MSN, PIN, etc.
- IP information given to 11 IP information of the application server 17 which is the destination of the packet
- control unit 124 may store the security policy setting information specified by the firewall management server 14 in the storage unit 126.
- the security policy may be set differently according to the number or identification information of the terminal.
- the firewall function unit 127 is configured to apply a security policy by the firewall management server 14 and, when set to use the internal firewall function unit 127, according to the designated security policy, the terminal 11 and the application server. Analyze the packets transmitted between (17) and determine whether they comply with the security policy or violate.
- the control unit 124 may identify the identification information of the corresponding terminal 11 stored in the storage unit 126 and the IP of the application server 17. With reference to the information, the connection termination signal including the release of the PDP context is generated for each of them and transmitted to the terminal 11 and the application server 17, and the relay operation is performed by discarding the packet without transmitting it to the relay unit 125. To prevent this from happening.
- the input / output unit 128 allows the firewall management server 14 to access the security relay 12 to set various security policies.
- the control unit 124 may communicate with the external firewall facility 13 to request the analysis of the packet through the input and output unit 128.
- FIG. 3 is a flowchart illustrating a message flow of a secure mobile communication repeater having a firewall function according to an embodiment of the present invention, which is based on service option negotiation between a terminal and a network base station in the 3GPP2 standard.
- TIA TSB 58 of the 3GPPS standard specifies a process in which a service option negotiation is performed on which service is used between a terminal and a base station when the mobile communication terminal starts a wireless mobile communication service.
- Service options are expanding as mobile technology evolves, and depending on network equipment, certain services may not be available.
- the service option negotiation is defined by a procedure for negotiating between the terminal and the base station before entering the service.
- Service option negotiation is the process by which the requesting entity asks for and intends to use the service, and whether the other device or intermediate facility can provide such service.
- a user may establish a data transmission path between a specific application server 17 in a terminal 11 within an operating range of the security repeater 12. 12, a service option negotiation request signal (Service_Option_Request signal) including identification information of the terminal 11 is transmitted.
- Service_Option_Request signal Service_Option_Request signal
- step S32 the security repeater 12 stores the identification information of the terminal 11, while determining whether the service requested by the terminal 11 is a wireless data service. If the service is not a wireless data service, for example, a voice service or a short text service, the service is allowed and the terminal 11 is connected to the base station 16.
- a wireless data service for example, a voice service or a short text service
- the security relay 12 refers to the set security policy to determine whether the wireless data service is allowed.
- step S34 the security relay 12 blocks the relay of the service option negotiation request and transmits a signal (Service_Option_Reject) to reject the service option negotiation. To pass on. In this case, the terminal 11 indicates that the wireless data service is not available and terminates the connection attempt.
- Service_Option_Reject a signal that the wireless data service is not available and terminates the connection attempt.
- step S35 the security relay 12 transmits a service option negotiation request signal to the base station 16, and then grants the service option from the base station 16.
- the security relay 12 relays it to the terminal 11 as it is.
- PDP context is a set of information for using various types of packet data services.
- the base station 16 requests the PDP context and receives the PDP context from the base station 16.
- the PDP context may include parameters such as type of PDP (IP or PPP), PDP address and type thereof, QoS profile, authentication, DNS, and the like.
- the terminal 11 may be assigned an IP address and set QoS through a procedure of receiving PDP context information.
- step S37 the terminal 11 generates and transmits a packet regarding the desired wireless packet service.
- step S38 the security relay 12 analyzes the packet received from the terminal 11 or the application server 17 by either the internal firewall function 127 or the external firewall facility 13 according to the setting. And, it can be determined whether the received packet violates the security policy.
- step S39 if the packet does not violate the security policy, the security repeater 12 allows the relay of the packet to the base station 16 or the terminal 11.
- step S40 if it is determined that the packet violates the security policy, the security relay 12 discards the packet, and further, forcibly terminates the wireless packet service, the terminal 11 of the previously stored terminal 11 With reference to the identification information, the terminal 11 transmits a signal (Deactivate_PDP_Context_Request) requesting the release of the PDP context.
- a signal (Deactivate_PDP_Context_Request) requesting the release of the PDP context.
- step S40 No further packet data service is possible by this step S40, but if necessary, for example, the application server 17 to which the terminal 11 is connected is waiting for the reception of the packet, or the server 17 ) Continuously transmits the malicious code, in step S41, the security relay 12 also transmits a signal Deactivate_PDP_Context_Request indicating the release of the PDP context to the base station 16 as well.
- the present invention can be applied to various types of communication repeaters.
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- Computer Networks & Wireless Communication (AREA)
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- Computer Hardware Design (AREA)
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- General Engineering & Computer Science (AREA)
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Abstract
Description
Claims (12)
- 단말기와 이동통신 네트워크 기지국 사이에 전송되는 이동통신 신호를 기저대역 변복조하여 기저대역 데이터를 추출하는 기저대역 처리부;상기 기저대역 데이터를 분석하고, 설정된 보안 정책의 위반 판정 결과에 따라 상기 기저대역 데이터의 중계를 허용하거나 거부하는 제어부;상기 보안 정책의 설정 정보를 저장하는 저장부; 및상기 제어부의 지시에 따라 상기 기저대역 데이터에 포함된 패킷 데이터에 대하여 보안 정책의 위반 여부를 판정하는 방화벽 기능부를 포함하는 보안 이동통신 중계기.
- 청구항 1에 있어서, 상기 저장부는 보안 정책의 위반 판정을 상기 방화벽 기능부 또는 외부의 방화벽 설비 중 어떤 것을 통해 수행할 것인지 지정하는 방화벽 선택 정보를 더 저장하며,상기 제어부는 상기 방화벽 선택 정보에 따라, 상기 방화벽 기능부 또는 외부의 방화벽 설비 중 적어도 하나에 상기 패킷 데이터를 제공하도록 동작하는 것을 특징으로 하는 보안 이동통신 중계기.
- 청구항 1에 있어서, 상기 제어부는 상기 보안 정책이 무선 패킷 데이터 서비스를 허용하지 않도록 설정된 경우에는, 단말기로부터 수신된 기저대역 데이터가 서비스 옵션 교섭 요청 신호를 포함한 때에 서비스 옵션 교섭 거부 신호를 상기 단말기로 전송하도록 동작하는 것을 특징으로 하는 보안 이동통신 중계기.
- 청구항 1에 있어서, 상기 제어부는 상기 패킷 데이터가 보안 정책을 위반한다고 판정되면 상기 단말기에 PDP 컨텍스트 해제 요청 신호를 전송하도록 동작하는 것을 특징으로 하는 보안 이동통신 중계기.
- 청구항 4에 있어서, 상기 제어부는 단말기가 서비스 옵션 교섭 요청을 할 때에 상기 단말기의 식별 번호를 저장하고, 상기 패킷 데이터가 보안 정책을 위반한다고 판정되면 상기 단말기의 저장된 식별 번호에 기초하여 상기 단말기에 PDP 컨텍스트 해제 요청 신호를 전송하도록 동작하는 것을 특징으로 하는 보안 이동통신 중계기.
- 청구항 4에 있어서, 상기 제어부는 상기 패킷 데이터가 보안 정책을 위반한다고 판정되면 상기 이동통신 네트워크 기지국에 PDP 컨텍스트 해제 요청 신호를 전송하도록 동작하는 것을 특징으로 하는 보안 이동통신 중계기.
- 단말기와 이동통신 네트워크 기지국 사이에 이동통신 신호를 중계하는 보안 중계기를 이용한 보안 이동통신 중계 방법에 있어서, 상기 보안 중계기가보안 정책의 설정 정보를 저장하는 단계;상기 이동통신 신호를 기저대역 변복조하여 얻은 상기 기저대역 데이터에 포함된 패킷 데이터에 대하여, 상기 보안 정책에 관한 위반 여부의 판정 결과를 얻는 단계; 및상기 보안 정책을 위반하지 않은 것으로 판정된 경우에만 상기 기저대역 데이터의 중계를 허용하는 단계를 포함하는 보안 이동통신 중계 방법.
- 청구항 7에 있어서,상기 보안 정책의 위반 판정을 상기 보안 중계기에 내장된 방화벽 기능부 또는 외부의 방화벽 설비 중 어떤 것을 통해 수행할 것인지 지정하는 방화벽 선택 정보를 저장하는 단계; 및상기 방화벽 선택 정보에 따라, 상기 방화벽 기능부 또는 외부의 방화벽 설비 중 적어도 하나에 상기 패킷 데이터를 제공하는 단계를 더 포함하는 것을 특징으로 하는 보안 이동통신 중계 방법.
- 청구항 7에 있어서,상기 보안 정책이 무선 패킷 데이터 서비스를 허용하지 않도록 설정된 경우에, 단말기로부터 수신된 기저대역 데이터가 서비스 옵션 교섭 요청 신호를 포함한 때에 서비스 옵션 교섭 거부 신호를 상기 단말기로 전송하는 단계를 더 포함하는 것을 특징으로 하는 보안 이동통신 중계 방법.
- 청구항 7에 있어서, 상기 패킷 데이터가 보안 정책을 위반한다고 판정되면, 상기 단말기에 PDP 컨텍스트 해제 요청 신호를 전송하는 단계를 더 포함하는 것을 특징으로 하는 보안 이동통신 중계 방법.
- 청구항 10에 있어서,단말기가 서비스 옵션 교섭 요청을 할 때에 상기 단말기의 식별 번호를 저장하는 단계; 및상기 패킷 데이터가 보안 정책을 위반한다고 판정되면 상기 단말기의 저장된 식별 번호에 기초하여 상기 단말기에 PDP 컨텍스트 해제 요청 신호를 전송하는 단계를 더 포함하는 것을 특징으로 하는 보안 이동통신 중계 방법.
- 청구항 10에 있어서,상기 패킷 데이터가 보안 정책을 위반한다고 판정되면 상기 이동통신 네트워크 기지국에 PDP 컨텍스트 해제 요청 신호를 전송하는 단계를 더 포함하는 것을 특징으로 하는 보안 이동통신 중계 방법.
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CN201280075685.5A CN104620537A (zh) | 2012-09-11 | 2012-09-11 | 具有防火墙功能的安全移动通信中继器 |
PCT/KR2012/007294 WO2014042291A1 (ko) | 2012-09-11 | 2012-09-11 | 방화벽 기능을 가진 보안 이동통신 중계기 |
US14/426,165 US9537828B2 (en) | 2012-09-11 | 2012-09-11 | Secure mobile communication relay having firewall function |
GB1504529.7A GB2520223B (en) | 2012-09-11 | 2012-09-11 | Secure mobile communication relay having firewall function |
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PCT/KR2012/007294 WO2014042291A1 (ko) | 2012-09-11 | 2012-09-11 | 방화벽 기능을 가진 보안 이동통신 중계기 |
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US (1) | US9537828B2 (ko) |
CN (1) | CN104620537A (ko) |
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US12028924B2 (en) | 2020-04-21 | 2024-07-02 | Electronics And Telecommunications Research Institute | Method and apparatus for controlling multi-connectivity in wireless communication system |
CN113810902A (zh) * | 2020-05-30 | 2021-12-17 | 华为技术有限公司 | 一种确定用户面安全执行信息的方法、装置及系统 |
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Publication number | Publication date |
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US20150200913A1 (en) | 2015-07-16 |
CN104620537A (zh) | 2015-05-13 |
GB2520223B (en) | 2020-08-19 |
US9537828B2 (en) | 2017-01-03 |
GB201504529D0 (en) | 2015-04-29 |
GB2520223A (en) | 2015-05-13 |
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