Operating-level network address conversion method, operating-level network address conversion equipment and network system

Abstract

The invention relates to an operating-level network address conversion method which includes steps of receiving a source address as a private IP (internet protocol) address, a source port serial number as a message of the first port serial number; inquiring a public IP address uniquely corresponding to the private IP address and a port block affiliated to the public IP address according to preset static mapping relation information; substituting the source address in the message by the public IP address, substituting the source port serial number in the message by a dynamically selected second port serial number in the port block; and transferring the message after conversion to a target IP address. The invention further relates to operating-level network address conversion equipment a network system. The message is converted by the static mapping relation information, the source address and the source port serial number are substituted by corresponding IP addresses and port serial number selected from the port block, and accordingly, massive log data of the IP address conversion relation are not required to be stored and processed in real time, and address backtracking and single-point authentication can be realized by the static mapping relation information.

Description

technical field [0001] The invention relates to communication technology, in particular to a carrier-level network address conversion method, equipment and network system. Background technique [0002] With the development and wide application of network technology, the IPv4 address resources allocated to hosts connected to the Internet will soon be exhausted, so the introduction of IPv6 can be regarded as an inevitable trend of network evolution. However, before the exhaustion of IPv4 addresses, operators' networks, service platforms, terminals, and ICPs cannot fully support IPv6 and have IPv6 commercial capabilities. During the IPv6 transition period, how to prolong the service life of IPv4, ensure smooth transition of services, and buy time for IPv6 deployment are issues that operators need to consider. [0003] In the existing TCP / IP communication mode, in order to maintain the relative independence of protocols at each level and minimize changes to the existing protoco...

AI Technical Summary

Problems solved by technology

First of all, the scale of the operator's network is large, and the use of NAT technology requires calculation of each connection, and the use of different ports is relatively inefficient, and cannot adapt to the network address translation of a large-scale network; secondly, it is difficult for NAT technology to perform real-time Online traceability and offline traceability cannot meet the security needs of the operator's network; again, NAT technology cannot achieve single-point authentication in the operator's network; finally, there may be multiple device forms in the operator's network, but the NAT method cannot Applicable to various equipment forms at the same time

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