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

A network address translation, carrier-class technology, applied in the field of port release by carrier-class network address translation equipment, can solve the problems of unable to obtain new ports, easy to be occupied by P2P download, affecting users' normal access, etc. , the algorithm is simple, and the effect of improving the efficiency of use

Active Publication Date: 2015-02-18
CHINA INFOMRAITON CONSULTING & DESIGNING INST CO LTD
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  • Description
  • Claims
  • Application Information

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] The invention is applied as figure 1 As shown, a method for operating-level network address translation equipment to release ports is mainly used in an operating-level network address translation device. The operating-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 by the operator to allocate private IPv4 addresses to users, and the user's access message passes through the operator-level network address conversion device to map the public address + port block corresponding to the user's private network IPv4 address according to a certain (Refer to related patent materials, application numbers: 201110240706.1, 201110230341.4, 201110240082.3), the converted public network IPv4 address port number is selected from the IPv4 public net...

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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 ports of an operator-level network address translation device. Background technique [0002] As the global IPv4 address resources have been allocated, some operators with high demand for new addresses will inevitably introduce carrier-grade network address translation (NAT, Network Address Translation) equipment to maintain continuous business development. In this scenario, a user uses a private IPv4 address to access the Internet, and the access request message undergoes carrier-level network address translation. The source address of the translated message becomes a public source address, and it passes through the Internet to the server. While providing high-traffic network address translation, in order to adapt to the operating environment, the carrier-grade NAT device introduces a static address mapping relationship to specify a fixed public a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/12
Inventor 袁源石启良张艳杨建李忠超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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