CN114268611A - Anti-theft calling method and system of network telephone, relay gateway and IPPBX - Google Patents
Anti-theft calling method and system of network telephone, relay gateway and IPPBX Download PDFInfo
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Abstract
The invention relates to the technical field of communication, and discloses a method and a system for preventing a network telephone from being stolen, a trunk gateway and an IPPBX (Internet protocol private branch exchange), aiming at solving the problem that the existing network telephone is stolen, wherein the main scheme comprises the following steps: the trunk gateway is connected with a program controlled switch of a public switched telephone network through a trunk line, and the trunk gateway is respectively connected with at least one IP voice switch IPPBX; after receiving the call request, the trunk gateway sends an inquiry request to each IPPBX, judges whether the called number or the calling number in the call request is a legal user or not according to the inquiry result returned by all IPPBXs, obtains a judgment result, and allows or rejects the call according to the judgment result. The invention improves the safety of the network telephone and is suitable for large enterprises.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a method and a system for preventing a network telephone from being stolen, a trunk gateway and an IPPBX.
Background
Voice over Internet Protocol (VoIP) is a Voice call technology, which achieves Voice call and multimedia conference via Internet Protocol (IP), that is, performs communication via Internet, specifically, a technology that digitizes, compresses and converts Voice into IP packets, and then transmits the packets partially or completely based on IP network.
With the development of communication technology, users have higher and higher security requirements for network phones based on VoIP technology, and it is necessary to provide reliable security networks for customers as product service providers. However, due to the endless hierarchy of security attack means, networking models are strange, especially in the networking model of large enterprises, because of the large number of users, it is necessary to deploy multiple sets of IP voice switches (IP pbxs) to perform packet management on user data, dial routes are assigned to each other among different IP pbxs, and each IP pbx is communicated with a program control switch through a trunk gateway by using a trunk line of E1. Because of having multiple sets of IPPBX to manage the grouping of the user data, the traditional SPC exchange does not carry out the authentication of the number for the incoming call or the outgoing call through E1, and if the number is illegal, the illegal calling situation, namely the illegal calling situation, can be generated. Two main situations are involved:
(1) and the intranet is attacked due to safety reasons, and calls are stolen through the intranet. For example, an illegal user A calls in a user C through an E1 line of a SPC (private branch exchange) of a mobile network operator, the call is sent to a trunk gateway, the trunk gateway finds that the user C is not a local user according to the IPPBX-1 and the IPPBX-1 sent to the trunk gateway, and the user C is sent back to the trunk gateway according to the route; as a result, illegal calls are generated, which results in additional telephone charges for the enterprise.
(2) Incoming calls to E1 lines that interface with the enterprise network through the SPC exchange, and incoming calls from E1 lines, result in theft. For example, an internal illegal user B (can cheat the IPPBX by an attack, and let the IPPBX think that the user B is a legal user) initiates a call, and the IPPBX-1 finds that the called number C is not a local user and sends the called number C back to the trunking gateway according to the route, so that the illegal call can be generated, and the phenomenon of embezzlement can be generated.
Disclosure of Invention
The invention aims to solve the problem of the existing network telephone that the network telephone is stolen and provides a method and a system for preventing the network telephone from being stolen, a trunk gateway and an IPPBX.
The technical scheme adopted by the invention for solving the technical problems is as follows:
in a first aspect, a method for preventing internet phone calls from being stolen is provided, which is applied to a trunking gateway, the trunking gateway is connected with a stored program control switch of a public switched telephone network through a trunk line, and the trunking gateway is respectively connected with at least one IP voice switch IP pbx, the method includes:
after receiving the call request, the trunk gateway sends an inquiry request to each IPPBX, judges whether the called number or the calling number in the call request is a legal user or not according to the inquiry result returned by all IPPBXs, obtains a judgment result, and allows or rejects the call according to the judgment result.
As a further optimization, the determining whether the called number or the calling number in the call request is a valid user specifically includes:
after receiving the call request from the SPC exchange, the relay gateway respectively initiates query requests containing called numbers to each IPPBX; after receiving the query request, the IPPBX judges whether the called number in the query request is a local number and returns a query result; when the query results returned by all IPPBXs indicate that the called number is not a local number, the relay gateway judges that the called number in the call request is not a legal user, otherwise, the relay gateway judges that the called number in the call request is a legal user; or
After receiving the call request from the IPPBX, the relay gateway respectively initiates an inquiry request containing a calling number to each IPPBX; after receiving the query request, the IPPBX judges whether the calling number in the query request is a local number and returns a query result; and when all query results returned by the IPPBX are characterized in that the calling number is not a local number, the trunk gateway judges that the calling number in the call request is not a legal user, otherwise, the trunk gateway judges that the calling number in the call request is a legal user.
As a further optimization, the allowing or rejecting the call according to the judgment result specifically includes:
when the called number in the call request is judged to be a legal user, allowing the call, and when the called number in the call request is judged not to be a legal user, rejecting the call; or
And when the calling number in the call request is judged to be a legal user, allowing the call, and when the calling number in the call request is judged not to be a legal user, rejecting the call.
As a further optimization, after the preset time for initiating the query request to each ip pbx, if the query result returned by the ip pbx is not received, the query result of the corresponding ip pbx is set to indicate that the calling number is a local number.
In a second aspect, another method for preventing internet phone calls from being stolen is provided, which is applied to an IP voice switch IP pbx, and the method includes:
the IPPBX receives an inquiry request sent by the relay gateway, judges whether a called number or a calling number in the inquiry request is a local number or not and returns an inquiry result; and responding to an inquiry request sent to the IPPBX by the trunk gateway after receiving the call request, so that the trunk gateway can judge whether the called number or the calling number in the call request is a legal user according to the inquiry result returned by all the IPPBXs, obtain a judgment result and allow or reject the call according to the judgment result.
In a third aspect, a trunking gateway is provided, where the trunking gateway is connected to a SPC switch of a public switched telephone network through trunk lines, and the trunking gateway is respectively connected to at least one IP voice switch IPPBX, and the trunking gateway includes:
a receiving unit for receiving a call request;
the sending unit is used for sending query requests to each IPPBX after receiving the call requests;
the judging unit is used for judging whether the called number or the calling number in the calling request is a legal user according to the query results returned by all IPPBXs to obtain a judgment result;
and the execution unit is used for allowing or rejecting the call according to the judgment result.
As a further optimization, the determining unit is specifically configured to:
after receiving a call request from the SPC exchange, respectively initiating an inquiry request containing a called number to each IPPBX; after receiving the query request, the IPPBX judges whether the called number in the query request is a local number and returns a query result; when the query results returned by all IPPBXs indicate that the called number is not a local number, the relay gateway judges that the called number in the call request is not a legal user, otherwise, the relay gateway judges that the called number in the call request is a legal user; or
After receiving a call request from the IPPBX, respectively initiating an inquiry request containing a calling number to each IPPBX; after receiving the query request, the IPPBX judges whether the calling number in the query request is a local number and returns a query result; and when all query results returned by the IPPBX are characterized in that the calling number is not a local number, the trunk gateway judges that the calling number in the call request is not a legal user, otherwise, the trunk gateway judges that the calling number in the call request is a legal user.
As a further optimization, the execution unit is specifically configured to:
when the called number in the call request is judged to be a legal user, allowing the call, and when the called number in the call request is judged not to be a legal user, rejecting the call; or
And when the calling number in the call request is judged to be a legal user, allowing the call, and when the calling number in the call request is judged not to be a legal user, rejecting the call.
In a fourth aspect, there is provided an ip pbx, the ip pbx comprising:
the receiving unit is used for receiving the query request sent by the relay gateway;
a judging unit, configured to judge whether a called number or a calling number in the query request is a local number;
and the sending unit is used for returning the query result of the judging unit so as to respond to the query request sent to the IPPBX by the trunk gateway after receiving the call request, and the trunk gateway is convenient to judge whether the called number or the calling number in the call request is a legal user according to the query result returned by all the IPPBXs, obtain the judgment result and allow or reject the call according to the judgment result.
In a fifth aspect, a system for preventing internet phone calls from being stolen is provided, which includes: the system comprises a program controlled switch, a trunk gateway and at least one IP voice switch IPPBX of a public switched telephone network, wherein the trunk gateway is connected with the program controlled switch through a trunk line and is respectively connected with the at least one IPPBX;
the trunk gateway is used for sending an inquiry request to each IPPBX after receiving the call request, judging whether a called number or a calling number in the call request is a legal user according to the inquiry result returned by all the IPPBXs, obtaining a judgment result and allowing or rejecting the call according to the judgment result;
and the IPPBX is used for judging whether a called number or a calling number in the query request is a local number or not after receiving the query request sent by the relay gateway and returning a query result.
The invention has the beneficial effects that: according to the method and the system for preventing the network telephone from being stolen, the trunk gateway and the IPPBX, the trunk gateway authenticates the calling number or the called number in the calling request, judges whether the calling number or the called number is an illegal user, and allows or rejects the calling according to the judgment result, so that the network telephone is effectively prevented from being stolen, and the safety of the network telephone is improved.
Drawings
Fig. 1 is a schematic structural diagram of an anti-spoofing system of a network telephone according to an embodiment of the present invention;
fig. 2 is a flow chart of an incoming call according to an embodiment of the present invention;
FIG. 3 is a flow chart of an outgoing call according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a relay gateway according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an ip pbx according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The invention provides a system for preventing network telephone from dialing illegally, which comprises: the system comprises a program controlled switch, a trunk gateway and at least one IP voice switch IPPBX of a public switched telephone network, wherein the trunk gateway is connected with the program controlled switch through a trunk line and is respectively connected with the at least one IPPBX; the realization process is as follows: the trunk gateway sends an inquiry request to the IPPBX after receiving the call request, the IPPBX judges whether the called number or the calling number in the inquiry request is a local number or not and returns an inquiry result after receiving the inquiry request sent by the trunk gateway, the trunk gateway judges whether the called number or the calling number in the call request is a legal user or not according to the inquiry result returned by all the IPPBXs, a judgment result is obtained, and the call is allowed or rejected according to the judgment result.
Specifically, in a large IP telephone network, a plurality of sets of IP pbxs are generally provided to perform packet management on user data, and it is difficult to determine the IP pbx corresponding to the number in the call request, so that the number cannot be authenticated by the IP pbx, and the problem of stolen calling of the network telephone is caused. Based on this, the invention realizes number authentication in the call request through the relay gateway, specifically, after the relay gateway receives the call request from the program controlled switch or IPPBX of the public switched telephone network, the relay gateway initiates a query request to each IPPBX, realizes authentication of the called number or the calling number in the call request according to the query result returned by each IPPBX, judges whether the called number or the calling number is a legal user, and allows or rejects the call according to the judgment result, thereby effectively preventing the network telephone from being stolen.
Examples
As shown in fig. 1, the system for preventing internet phone calls from being stolen according to the embodiment of the present invention includes: the system comprises a program controlled switch, a trunk gateway and at least one IP voice switch IPPBX of a public switched telephone network, wherein the trunk gateway is connected with the program controlled switch through a trunk circuit, the trunk gateway is respectively connected with the at least one IP voice switch IPPBX, and the embodiment comprises N IPPBXs which are IPPBX-1, IPPBX-2, … … and IPPBX-N respectively.
The SPC exchange of the public switched telephone network is used for realizing call forwarding between an internal user of an IP telephone network and an external user of a mobile network operator.
Based on the above system, the present embodiment provides a method for preventing a network telephone from being stolen for both the case of an incoming call for indicating that an external user operating a mobile network makes a call request to an internal user of an IP telephone network and the case of an outgoing call for indicating that a call request is made to an external user operating a mobile network through an internal user of an IP telephone network.
For an incoming call, comprising: after the trunk gateway receives the call request from the SPC switch, the trunk gateway respectively initiates an inquiry request containing the called number to each IPPBX, judges whether the called number in the call request is a legal user according to the inquiry result returned by each IPPBX, obtains a judgment result, and allows or rejects the call according to the judgment result.
As shown in fig. 2, when an incoming call is received, the SPC exchange sends a call request to the trunking gateway, which specifically includes the following steps:
And 3, the trunk gateway receives query results http _ Response returned by all IPPBXs, judges the called number as a legal user as long as one IPPBX returns 200 messages, allows calling at the moment, and sends the calling Invite to the corresponding IPPBX. If all IPPBXs return 404 a message, the called number is determined to be an illegal user, and the call is rejected.
In order to ensure the timeliness of the call, when the relay gateway does not receive the query result http _ Response returned by the IPPB after the preset time of sending the query Request http _ Request, the return result is set to be 200 messages, and the next processing is continued. The preset time can be set according to actual conditions, for example, 2 seconds.
For an outgoing call, comprising: after the relay gateway receives the call request from the IPPBX, the relay gateway respectively initiates an inquiry request containing a calling number to each IPPBX, judges whether the calling number in the call request is a legal user according to the inquiry result returned by each IPPBX, obtains a judgment result, and allows or rejects the call according to the judgment result.
As shown in fig. 3, when an outgoing call is made, the ip pbx sends a call request to the trunking gateway, and specifically includes the following steps:
step A, after receiving the call Request Invite from the IPPBX, the relay gateway simultaneously initiates a query Request http _ Request containing the calling number to all the IPPBXs for judging whether the calling number is a legal user.
Step B, each IPPBX judges whether the number is a local number corresponding to the IPPBX according to the calling number carried in the query Request http _ Request, returns a query result http _ Response to the relay gateway, and returns a 200 message to the relay gateway if the number is the local number; if not, a message is returned 404 to the trunking gateway.
And step C, the trunk gateway receives query results http _ Response returned by all IPPBXs, if one IPPBX returns 200 messages, the calling number is judged to be a legal user, at the moment, the calling is allowed, and a Setup call request (different E1 protocols and different message names) is initiated to the SPC (programmable switching exchange). If all IPPBXs return 404 a message, the calling number is determined to be an illegal user, at which time the call is rejected.
In addition, in order to avoid the problem of compatibility with other operator products, in this embodiment, the trunking gateway is further provided with a service switch, where the service switch is used to turn on or off the judgment on the calling number and the called number, and after the service switch is turned off, if the trunking gateway receives a call request from the program controlled switch or receives a call request initiated to the program controlled switch, the number is not authenticated, and the call is directly allowed.
Based on the above technical solution, this embodiment further provides a trunking gateway, where the trunking gateway is connected to a program controlled switch of a public switched telephone network through a trunk line, and the trunking gateway is respectively connected to at least one IP voice switch IP pbx, as shown in fig. 4, the trunking gateway includes:
a receiving unit 401, configured to receive a call request;
a sending unit 402, configured to send an inquiry request to each ip pbx after receiving a call request;
a judging unit 403, configured to judge whether the called number or the calling number in the call request is a valid user according to the query result returned by all IPPBXs, and obtain a judgment result;
and an executing unit 404, configured to allow or reject the call according to the determination result.
Based on the above technical solution, this embodiment further provides an ip pbx, as shown in fig. 5, the ip pbx includes:
a receiving unit 501, configured to receive an inquiry request sent by a relay gateway;
a judging unit 502, configured to judge whether a called number or a calling number in the query request is a local number;
and a sending unit 503, configured to return an inquiry result of the determining unit, so as to respond to an inquiry request sent to the ip pbx after the trunk gateway receives the call request, and so that the trunk gateway determines, according to the inquiry result returned by all the ip pbxs, whether a called number or a calling number in the call request is a valid user, obtains a determination result, and allows or rejects the call according to the determination result.
It can be understood that, the trunk gateway and the ip pbx according to the embodiment of the present invention are apparatuses for implementing the method for preventing internet phone calls from being stolen according to the embodiment, and for the apparatuses disclosed in the embodiment, since they correspond to the methods disclosed in the embodiment, the description is simpler, and the related parts can be referred to the partial description of the methods.
In summary, in the embodiment, the number authentication in the call request is implemented through the relay gateway to determine whether the calling number or the called number is a legal user, and the call is allowed or rejected according to the determination result, so that the network telephone is effectively prevented from being stolen, and the security of the network telephone is improved.
Claims (10)
1. The method for preventing the network telephone from being stolen is characterized in that the method is applied to a trunk gateway, the trunk gateway is connected with a stored program control exchange of a public switched telephone network through a trunk line, and the trunk gateway is respectively connected with at least one IP voice exchange IPPBX (internet protocol private branch exchange), and the method comprises the following steps:
after receiving the call request, the trunk gateway sends an inquiry request to each IPPBX, judges whether the called number or the calling number in the call request is a legal user or not according to the inquiry result returned by all IPPBXs, obtains a judgment result, and allows or rejects the call according to the judgment result.
2. The method for preventing unauthorized dialing of a network phone according to claim 1, wherein said determining whether the called number or the calling number in the call request is a valid subscriber specifically comprises:
after receiving the call request from the SPC exchange, the relay gateway respectively initiates query requests containing called numbers to each IPPBX; after receiving the query request, the IPPBX judges whether the called number in the query request is a local number and returns a query result; when the query results returned by all IPPBXs indicate that the called number is not a local number, the relay gateway judges that the called number in the call request is not a legal user, otherwise, the relay gateway judges that the called number in the call request is a legal user; or
After receiving the call request from the IPPBX, the relay gateway respectively initiates an inquiry request containing a calling number to each IPPBX; after receiving the query request, the IPPBX judges whether the calling number in the query request is a local number and returns a query result; and when all query results returned by the IPPBX are characterized in that the calling number is not a local number, the trunk gateway judges that the calling number in the call request is not a legal user, otherwise, the trunk gateway judges that the calling number in the call request is a legal user.
3. The method according to claim 1 or 2, wherein the allowing or rejecting the call according to the determination result specifically comprises:
when the called number in the call request is judged to be a legal user, allowing the call, and when the called number in the call request is judged not to be a legal user, rejecting the call; or
And when the calling number in the call request is judged to be a legal user, allowing the call, and when the calling number in the call request is judged not to be a legal user, rejecting the call.
4. The method of claim 2, wherein after the predetermined time for initiating the query request to each ip pbx, if the query result returned from the ip pbx is not received, the query results corresponding to the ip pbx are set to indicate that the calling number is a local number.
5. The method for preventing the network telephone from being stolen is characterized in that the method is applied to an IP voice switch IPPBX and comprises the following steps:
after receiving an inquiry request sent by a relay gateway, the IPPBX judges whether a called number or a calling number in the inquiry request is a local number and returns an inquiry result; and responding to an inquiry request sent to each IPPBX by the trunk gateway after receiving the call request, and judging whether the called number or the calling number in the call request is a legal user or not by the trunk gateway according to the inquiry result returned by all the IPPBXs to obtain a judgment result and allowing or rejecting the call according to the judgment result.
6. A trunking gateway, wherein said trunking gateway is connected to a SPC switch of a public switched telephone network via trunk lines, and wherein said trunking gateway is connected to at least one IP voice switch IPPBX, respectively, said trunking gateway comprising:
a receiving unit for receiving a call request;
the sending unit is used for sending query requests to each IPPBX after receiving the call requests;
the judging unit is used for judging whether the called number or the calling number in the calling request is a legal user according to the query results returned by all IPPBXs to obtain a judgment result;
and the execution unit is used for allowing or rejecting the call according to the judgment result.
7. The trunking gateway of claim 6, wherein the determining unit is specifically configured to:
after receiving a call request from the SPC exchange, respectively initiating an inquiry request containing a called number to each IPPBX; after receiving the query request, the IPPBX judges whether the called number in the query request is a local number and returns a query result; when the query results returned by all IPPBXs indicate that the called number is not a local number, the relay gateway judges that the called number in the call request is not a legal user, otherwise, the relay gateway judges that the called number in the call request is a legal user; or
After receiving a call request from the IPPBX, respectively initiating an inquiry request containing a calling number to each IPPBX; after receiving the query request, the IPPBX judges whether the calling number in the query request is a local number and returns a query result; and when all query results returned by the IPPBX are characterized in that the calling number is not a local number, the trunk gateway judges that the calling number in the call request is not a legal user, otherwise, the trunk gateway judges that the calling number in the call request is a legal user.
8. The trunking gateway of claim 6 or 7, wherein the execution unit is specifically configured to:
when the called number in the call request is judged to be a legal user, allowing the call, and when the called number in the call request is judged not to be a legal user, rejecting the call; or
And when the calling number in the call request is judged to be a legal user, allowing the call, and when the calling number in the call request is judged not to be a legal user, rejecting the call.
9. An ip pbx, the ip pbx comprising:
the receiving unit is used for receiving the query request sent by the relay gateway;
a judging unit, configured to judge whether a called number or a calling number in the query request is a local number;
and the sending unit is used for returning the query result of the judging unit so as to respond to the query request sent to the IPPBX by the trunk gateway after receiving the call request, and the trunk gateway is convenient to judge whether the called number or the calling number in the call request is a legal user according to the query result returned by all the IPPBXs, obtain the judgment result and allow or reject the call according to the judgment result.
10. The system of preventing the network telephone from stealing call is characterized by comprising: the system comprises a program controlled switch, a trunk gateway and at least one IP voice switch IPPBX of a public switched telephone network, wherein the trunk gateway is connected with the program controlled switch through a trunk line and is respectively connected with the at least one IPPBX;
the trunk gateway is used for sending an inquiry request to each IPPBX after receiving the call request, judging whether a called number or a calling number in the call request is a legal user according to the inquiry result returned by all the IPPBXs, obtaining a judgment result and allowing or rejecting the call according to the judgment result;
and the IPPBX is used for judging whether a called number or a calling number in the query request is a local number or not after receiving the query request sent by the relay gateway and returning a query result.
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