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.
Discusses ways Linux system administrators can secure a system from intruders, by Michael Jastremski, LinuxFocus July 1998.
An interesting article that covers Linux 2.4 kernel firewalling code and the differences from the previous 2.2 ipchains code.
A step-by-step guide to setting up and using OpenSSH instead of telnet on your Linux box.
Outlines the kernel security improvements that have been made in the 2.4 Linux kernel.
Brief discussion on what to check to ensure Linux system security, by Marcus Berglund, Linux Gazette January 1998.
Introduction to securing a Linux box, by Peter Vertes, Linux Gazette November 1998.
An introductory article on Linux security, by Andrew Berkheimer, Linux Gazette April 1997.
Introductory tutorial on securing a Linux system, with information on securing tcpd, by Kelley Spoon, Linux Gazette February 1997.
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