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2007年12月31日

最全面的介绍：PPTP和L2TP的区别
摘要： PPTP uses TCP port 1723 for it's control connection and GRE (IP protocol 47) for the PPP data. PPTP supports data encryption by using MPPE. L2TP uses UDP to transport the PPP data, this is often encap... 阅读全文
posted @ 2007-12-31 16:38 岌岌可危 阅读(7338) 评论(0) 推荐(0)

L2TP的包过滤规则
摘要： 参考http://www.unix.org.ua/orelly/networking_2ndEd/fire/ch14_12.htm 14.12. Layer 2 Transport Protocol (L2TP) The Layer 2 Transport Protocol (L2TP) is another generic encapsulation protocol designed to a... 阅读全文
posted @ 2007-12-31 16:13 岌岌可危 阅读(456) 评论(0) 推荐(0)

pptp的包过滤规则
摘要： 14.11.3. Packet Filtering Characteristics of PPTP PPTP negotiation takes place on TCP port 1723. The actual tunnel is based on GRE, which is IP protocol 47, and uses GRE protocol hexadecimal 880B (ind... 阅读全文
posted @ 2007-12-31 15:54 岌岌可危 阅读(336) 评论(0) 推荐(0)