Shorewall Requirements

A kernel that supports netfilter. I've tested with 2.4.2 - 2.4.20-pre6. Check here for kernel configuration information. If you are looking for a firewall for use with 2.2 kernels, see the Seattle Firewall site .
iptables 1.2 or later but beware version 1.2.3 -- see the Errata. WARNING: The buggy iptables version 1.2.3 is included in RedHat 7.2 and you should upgrade to iptables 1.2.4 prior to installing Shorewall. Version 1.2.4 is available from RedHat and in the Shorewall Errata. If you are going to be running kernel 2.4.18 or later, NO currently-available RedHat iptables RPM will work -- again, see the Shorewall Errata.
Some features require iproute ("ip" utility). The iproute package is included with most distributions but may not be installed by default. The official download site is ftp://ftp.inr.ac.ru/ip-routing.
A Bourne shell or derivative such as bash or ash. Must have correct support for variable expansion formats ${variable%pattern }, ${variable%%pattern}, ${variable#pattern } and ${variable##pattern}.
The firewall monitoring display is greatly improved if you have awk (gawk) installed.

Last updated 9/19/2002 - Tom Eastep