Method for realizing external network user crossing NAT equipment

An implementation method and user technology, applied in the field of network communication, can solve the problems of inability to receive, unable to transmit a SETUP message to a called client, and a user connected to a GW cannot make a successful call, and achieves the effect of a reliable technical solution
CN1767509AInactive Publication Date: 2006-05-03BEIJING JIAXUN FEIHONG ELECTRIC CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
BEIJING JIAXUN FEIHONG ELECTRIC CO LTD
Publication Date
2006-05-03
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

This invention relates to a method for realizing crossing over NAT equipments by external users including: after registering successfully to a net-guard, a GW in a private net sends a request for connecting the call signaling to the net-guard to set up related TCP connection and store it, then, when an external user calls the user under the GW of the private net, the net-guard sends the received call message to the user under the GW of the private net via the stored TCP connection corresponding to said GW, therefore, when an external net calling user calls the private net user connected with H323 GW under the NAT device, this invention can ensure it to call the called private net user smoothly via the net-guard and related TCP connection.
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Description

technical field

[0001] The invention relates to the technical field of network communication, and in particular to a method for realizing traversal of NAT equipment by external network users. Background technique

[0002] In the existing communication network, when at least one GW (gateway) of the communication parties is located in the private network behind the NAT (Network Address Translation) server, the user connected to the GW in the private network is called from outside the private network The call will fail. This is because after the call initiated from outside the private network reaches the GK (gatekeeper), the gatekeeper GK can only connect the call to the corresponding NAT device through the corresponding TCP (Transmission Control Protocol), and on the NAT device, then Since there is no mapping relationship between the GW in the private network and the NAT device, the SETUP (establishment) message of Q931 cannot be transmitted to the private network, so the GW ...

Claims

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