Network address translation method and NAT gateway

A technology of network address translation and address translation, which is applied in the field of network address translation methods and NAT gateways, and can solve the problems of NAT gateway card-issuing traffic blockage, etc.

Active Publication Date: 2020-06-19
SHANDONG LANGCHAO YUNTOU INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a network address translation method and a NAT gateway, which can solve the problem of unreachable card issuing traffic in the NAT gateway

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  • Network address translation method and NAT gateway
  • Network address translation method and NAT gateway
  • Network address translation method and NAT gateway

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Embodiment Construction

[0047] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection of the present invention. scope.

[0048] Such as figure 1 As shown, the real-time example of the present invention provides a network address translation method, which is applied to a network address translation NAT gateway, including:

[0049]Step 101: Obtain the first data packet sent by the current intranet server in the local area network through the current intranet IP addre...

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Abstract

The invention provides a network address translation method and an NAT gateway, which are applied to the NAT gateway and comprise the following steps: acquiring a first data packet sent by a current intranet server in a local area network through a current intranet IP address; when the target IP address in the first data packet is matched with an extranet IP address configured by the NAT gateway,modifying input port information in the first data packet according to an extranet router connected with the NAT gateway to obtain a second data packet; determining a current extranet IP address corresponding to the current intranet IP address, and determining a target intranet IP address corresponding to the target IP address; and sending the second data packet to a target intranet server in a local area network indicated by the target intranet IP address through the current extranet IP address. According to the scheme, the problem that the card issuing flow in the NAT gateway is blocked canbe solved.

Description

technical field [0001] The invention relates to the field of computer technology, in particular to a network address conversion method and a NAT gateway. Background technique [0002] At present, in a Network Address Translation (NAT) gateway, it is necessary to convert the IP address whose source address is an internal network address into an external network IP address, that is, source address translation SNAT, and also needs to convert the target IP address to an internal network address. The destination IP address of the public IP address of the intranet server is converted into the IP address of the intranet, that is, destination address translation DNAT. [0003] In this case, each intranet server is equivalent to having a public IP address. If an intranet server uses the public IP address of another intranet server to access the intranet server, the NAT gateway usually The access data packets will be sent to the external network router. However, since the source IP i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/12
CPCH04L61/2503H04L61/5007
Inventor 杨燚张晖孙思清李彦君
Owner SHANDONG LANGCHAO YUNTOU INFORMATION TECH CO LTD
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