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发明授权
CN1825828B 一种两端均处于不同NAT下直接穿透通信的控制方法和设备 有权

一种两端均处于不同NAT下直接穿透通信的控制方法和设备
摘要：
本发明公开了用于使得处于NAT下与在不同NAT下用户装置进行直接穿透通信的用户装置及其通信，通过由一个选择的本地端口向外网辅助探测装置发送探测报文，并接收来自所述辅助探测装置的应答报文获取该探测报文被NAT转换的NAT源端口，并通过比较多次探测报文的NAT源端口来确定所选择的本地端口是否为穿透端口，然后将其对应的NAT源地址和NAT穿透端口通过外网设备通知在不同NAT下的另一个用户装置(同样也通过外网设备来接收所述另一个用户装置所确定的NAT穿透端口和NAT源地址)，从而可以经由所确定的本地穿透端口将对方的NAT源地址和NAT穿透端口作为目的地址和目的端口进行直接穿透通信。
摘要（英）：

This invention discloses user devices carrying out direct penetration communication of different user devices under different NAT and a communication method, in which, a selected local port sends a detection message to an outer network assistant detection device and receives a response message from it and obtains a NAT source port of said detection message transformed by NAT and determines if theselected local one is the penetration port by comparing NAT source ports of multiple messages, then informs the corresponding NAN address and the NAT penetration port to another user device of different NAT by an outer network device so as to carry out direct penetration communication taking the object NAT source address and NAT penetration port as the destination address and port via the determined local penetration port.

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