Method for releasing port of carrier-grade network address translation equipment

A network address translation, carrier-level technology, applied in the field of port release of carrier-level network address translation equipment, can solve the problems of inability to obtain new ports, ports are easily occupied by P2P downloads, and affect normal access of users, so as to achieve small port accidental damage , the algorithm is simple, and the effect of improving the efficiency of use

Active Publication Date: 2013-01-16
CHINA INFOMRAITON CONSULTING & DESIGNING INST CO LTD
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AI Technical Summary

Problems solved by technology

When the carrier-level NAT device limits the number of ports for users, such as 2048, when there is no P2P download, the existing port number can fully meet the needs of ordinary Internet applications; after enabling P2P download, the carrier-level NAT device can easily allocate a large number of ports for users If it is fully occupied by P2P downloads, subsequent application requests (such as games) cannot obtain new ports, which affects the normal access of users

Method used

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  • Method for releasing port of carrier-grade network address translation equipment
  • Method for releasing port of carrier-grade network address translation equipment
  • Method for releasing port of carrier-grade network address translation equipment

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Embodiment Construction

[0025] Application of the present invention such as figure 1 As shown, a method for releasing a port of a carrier-level network address translation device is mainly used in a carrier-level network address translation device. The carrier-level network address translation device includes a network address translation module, a port release module, a user address mapping table, and a local translation mapping table, free port list, and local session mapping table. Among them, the operator-level address allocation device is used for operators to assign private IPv4 addresses to users. After the user's access message passes through the operator-level network address translation device, the mapping relationship between the public address and the port block corresponding to the user's private network IPv4 address is determined. (refer to relevant patent materials, application number: 201110240706.1, 201110230341.4, 201110240082.3), the converted public network IPv4 address port numbe...

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Abstract

The invention discloses a method for releasing a port of carrier-grade network address translation equipment. According to the method, a carrier-grade network address translation device is involved; the carrier-grade network address translation device comprises a network address translation module, a port release module, a user address mapping table, a local translation mapping table, an idle port list and a local session mapping table; the carrier-grade network address translation device releases the port according to the occupation situation of the port accessed by a user; and the carrier-grade network address translation device executes the following steps on an arrived message: (a) inquiring the local translation mapping table; (b) inquiring the user address mapping table; (c) releasing the port; and (d) processing the local session mapping table.

Description

technical field [0001] The invention relates to the technical field of communication networks, in particular to a method for releasing a port of a carrier-level network address translation device. Background technique [0002] Since the global IPv4 address resources have been allocated, some operators with a large demand for new addresses will inevitably introduce carrier-level Network Address Translation (NAT, Network Address Translation, that is, Network Address Translation) equipment to maintain continuous business development. In this scenario, the user uses a private IPv4 address to access the Internet, and the access request packet undergoes carrier-level network address translation, and the converted source address of the packet becomes a public source address, and then reaches the server through the Internet. While providing large-traffic network address translation, in order to adapt to the operating environment, the carrier-level NAT device specifies a fixed public...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/12
Inventor 杨建李忠超袁源石启良张艳邹洁李阳春刘春林张家燕张洪良王吉顺胡波
Owner CHINA INFOMRAITON CONSULTING & DESIGNING INST CO LTD
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