Particular emphasis is placed on network security and firewall construction. Introduction to Linux Networking and Security offers a brief introduction to the IP networking services, how to configure them, and how to set up a relatively secure Linux workstation. An archive of cryptographic software for the linux operating system. DShield DShield provides a platform for users of firewalls to share intrusion information. DShield is a free and open service.
Attrition is an eclectic collection of Internet and computer security resources.