The SuSE Firewall And Masquerading Setup
(Version 2.0, February 1999 - Covering ipchains and LInux Kernel 2.2.*)The /proc File System
(Version 1.1 for Linux Kernel 2.2.*, January 1999)The S.u.S.E. Firewall Mini Howto
(Version 1.4, May 1998 - Covering ipfwadm and Linux Kernel 2.0.*)