Linux Security 101
- Introductory tutorial on securing a Linux system, with information on securing tcpd, by Kelley Spoon, Linux Gazette February 1997.
- http://linuxgazette.net/issue14/security.html

More Linux Security
- An introductory article on Linux security, by Andrew Berkheimer, Linux Gazette April 1997.
- http://linuxgazette.net/issue16/security.html

Securing Your Linux Box
- Introduction to securing a Linux box, by Peter Vertes, Linux Gazette November 1998.
- http://linuxgazette.net/issue34/vertes.html

A Bit About Security
- Brief discussion on what to check to ensure Linux system security, by Marcus Berglund, Linux Gazette January 1998.
- http://linuxgazette.net/issue24/berglund.html

Replacing Telnet: OpenSSH, a secure alternative
- A step-by-step guide to setting up and using OpenSSH instead of telnet on your Linux box.
- http://freeos.com/articles/2745/

Adding Security to Common Linux Distributions
- Discusses ways Linux system administrators can secure a system from intruders, by Michael Jastremski, LinuxFocus July 1998.
- http://www.linuxfocus.org/English/July1998/article60.html

Creating a Linux Firewall
- explains very thoroughly how to build your own `bastion host' firewall with Linux using the Trusted Information Systems (TIS) Firewall Toolkit, by Benjamin Ewy, Linux Journal May 1996.
- http://www.ssc.com/lj/issue25/1204.html