A method of external network mapping ipsec message to realize nat traversal
A technology of message and IP address, applied in the Internet field, can solve the problem that the message cannot realize NAT traversal, etc.
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[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0021] The present invention provides a method for implementing NAT traversal of IPsec messages mapped on an external network. The method is as follows: figure 1 shown, including:
[0022] S1. The NAT device receives the encapsulated message that has been fully authenticated by IPsec, and performs network address translation on the encapsulated message to obtain a converted message;
[0023] The intranet client sends a message to the external network terminal, and the IPsec tunnel is used between the internal and external security gateways for transmission. At this time, an IPsec tunnel needs to be negotiated. The NAT device receives the encapsulated message sent through full authentication, performs NAT address translation on it to obtain the converted message, and sends it to the external network.
[0024] S2. The external network...
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