NET-3-HOWTO: http://www.ssc.com/mirrors/LDP/HOWTO/NET3-4-HOWTO.html
IP-Masquerading HOWTO: http://www.ssc.com/mirrors/LDP/HOWTO/mini/IP-Masquerade.html
PPP-HOWTO: http://www.ssc.com/mirrors/LDP/HOWTO/PPP-HOWTO.html
Ethernet-HOWTO: http://www.ssc.com/mirrors/LDP/HOWTO/Ethernet-HOWTO.html
Firewall-HOWTO: http://www.ssc.com/mirrors/LDP/HOWTO/Firewall-HOWTO.html
IPCHAINS-HOWTO: http://www.ssc.com/mirrors/LDP/HOWTO/IPCHAINS-HOWTO.html