http://www.linux.org/ docs/ldp/howto/ Ethernet-HOWTO.html	Updated: May 1999. Information about which ethernet devices can be used for Linux, and how to set them up (focused on the hardware and low level driver aspect of the ethernet cards; see Network HOWTO for software configuration information).
http://www.linux.org/ docs/ldp/howto/ Firewall-HOWTO.html	Updated: February 2000. Designed to describe the basics of firewall systems and give you some detail on setting up both a filtering and proxy firewall on a Linux based system.
http://www.linux.org/ docs/ldp/howto/ IP-Masquerade-HOWTO.html	Updated: July 2000. How to enable the Linux IP Masquerade feature on a given Linux host.
http://www.linux.org/ docs/ldp/howto/ IPCHAINS-HOWTO.html	Updated: July 2000. How to obtain, install and configure the enhanced IP firewalling chains software for Linux, and some ideas on how you might use them.
http://www.linux.org/ docs/ldp/howto/ Multicast-HOWTO.html	Updated: March 1998. Tries to cover most aspects related to multicast over TCP/IP networks.
http://www.linux.org/ docs/ldp/howto/ Net-HOWTO.html	Updated: March 2000. Information about networking for Linux (relates only to version 4 of the Linux Networking Kernel or more specifically kernel releases 2.x and 2.2.x).
http://www.linux.org/ docs/ldp/howto/ NET3-4-HOWTO.html	Updated: August1999. Describes how to install and configure the Linux networking software and associated tools.
http://www.linux.org/ docs/ldp/howto/ Networking-Overview-HOWTO.html	Updated: July 2000. Overview of the networking capabilities of the Linux Operating System; provides pointers for further information and implementation details.
http://www.linux.org/ docs/ldp/howto/ Secure-Programs-HOWTO/ index.html	Updated: June 2000. Provides a set of design and implementation guidelines for writing secure programs for Linux and Unix systems.