NAT traversal method

Abstract

The invention discloses an NAT traversal method which can increase the success rate of traversal. The NAT traversal method comprises the auxiliary logon procedure of a traversal server and the data exchange procedure. According to the data exchange procedure, after the traversal server receives the request of a terminal user, log-on messages of the terminal user A and a terminal user B are searched for, if the logon message of the terminal user B can be inquired, NAT equipment types of the terminal user A and the terminal user B are determined firstly, and the terminal user A and the terminal user B carry out data transmission through an address and a port number of a direct connection channel.

Description

technical field [0001] The invention relates to the technical field of Internet communication, in particular to a NAT penetration method. Background technique [0002] In the rapidly developing Internet field, due to the ever-expanding scale of the Internet, the network address space resources are facing the crisis of being exhausted, so people generally use a network address translation (NAT) technology to alleviate the current severe situation. . NAT is a technology that isolates the internal network from the public network and converts private addresses into legal IP addresses. In addition, NAT only allows the internal network to initiate a connection request to the public network, while all connection requests from the public network to the internal network will be rejected. However, as people's demand for P2P applications continues to increase, connecting the intranet and the public network through NAT devices has become a communication mode commonly used in the Inter...

AI Technical Summary

Problems solved by technology

On the one hand, NAT technology can temporarily solve the problem of network address resource shortage and protect intranet address information; but on the other hand, the existence of a large number of NAT devices hinders the requirements for P2P communication between end users in different intranets, so it is necessary to Only by solving the NAT penetration problem can people meet the needs of a large number of P2P applications. Therefore, the existing technology provides a large number of NAT penetration methods. However, the existing NAT penetration methods do not fully consider the type of NAT device, and once the penetration If it fails, no more penetration attempts will be made, and there is no in-depth research on further attempts to penetrate. Therefore, the penetration success rate of the existing NAT penetration methods is still low