请问各位有没有详细的介绍ppp协议的文章?

因为我想用我的过滤设备对拨号连接时系统发给串口的ppp包进行修改. :)

Dear lmyes:

     I had write PPP one year before,and now I almost
forgot what files I had viewd.

     You can study protocols file:

RFC 1963 - PPP Serial Data Transport Protocol (SDTP)
RFC 1549 - PPP in HDLC Framing
RFC 1332 - The PPP Internet Protocol Control Protocol(IPCP)
RFC 1172 - Point-to-Point Protocol (PPP) initial configuration options
RFC 1334 - PPP Authentication Protocols
RFC 1144 header file compression

Or your can search the following keys:

LCP-Link control protocol
PAP-Password authentication protocol
CHAP-challenge-handshake authentication protocol
NCP-Network control protocol
HDLC-packets

Best Regards,
Li