摘要： 分析了在嵌入式Linux 路由器上实现同步PPP的问题并设计了几种解决方案。通过对各种方案的对比确定了一种最优方案，并将其实现。实验结果表明，该方案可以有效地进行同步PPP的PAP和CHAP认证以及NCP协商，并能够达到同步串口速率为2Mbps。

关键词: 密码验证协议, Linux套接字过滤, 盘问握手验证协议

Abstract: This paper analyzes the problems of the synchronous PPP in realizing the router based on embedded Linux,and designs some schemes. Compared with one another,the paper confirms one scheme and realizes it. Through the expremental results, this scheme can implement PAP and CHAP authentication. It can consult NCP successfully also. The velocity of the synchronous serial interface can come to 2Mbps.

中图分类号: 

• TP393.05