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

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...

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

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