Linux平台下移动IP穿越NAPT设备的实现

为实现移动IP穿越NAPT设备,根据RFC3519标准,修改现有的移动IP协议,并在Linux环境下进行UDP类型隧道穿越私有网络的NAPT设备的实验。实验中移动节点采用配置转交地址方式穿过外地网络的NAPT设备与其本地网络中的其他节点通信。数据分析结果表明,采用修改后的IP协议的移动节点漫游到外地网络后,仍可与本地网络节点通信,达到穿越NAPT设备的目的,但通信网络延迟明显增加,传输速度显著下降。该方案可为移动IP穿越实现提供参考。

Implementation of mobile IP traversing NAPT device on Linux

This paper is an attempt to allow mobile IP to traverse Network Address Port Translation device by modifying the existing mobile IP protocol according to the RFC3519 and introduces the experiment meant to cause UDP type of tunnel to traverse the NAPT device of the private network in the Linux environment.The experiment involves enabling the mobile node to communicate with the other nodes in the local network by traversing NAPT device of foreign network due to the adoption of the co-local care address.The data analysis shows that;after roaming to a foreign network,mobile node of the modified IP protocol keeps communication with the other nodes in the local network and fulfills the purpose of allowing mobile IP to traverse NAPT device achieves,but with the increased communication latency and the significantly reduced transmission speeds.The results offer a reference for implementation of mobile IP traversing NAPT device.