Firewall Module HOWTO ===================== Firewalling support in the EMAC SiB is done via the utility "ipchains." Additionally, the utility "ipmasqadm" and several kernel modules have been provided should you need port forwarding services. A sample firewall script has been provided, /etc/init.d/firewall. This script is symbolically linked in the directory /etc/rc2.d, for compatibility with System V init. Since the script causes the SiB to hang during boot (because of name resolution issues), the script has been shipped with no execute permissions. Once you have properly configured the script to your needs, you will need to execute the following command as root: chmod 700 /etc/init.d/firewall You can then reboot the SiB and use the firewalling features. More complete documentation is available at: http://www.linuxdocs.org/Firewall-HOWTO.html http://www.linuxdocs.org/IP-Masquerade-HOWTO.html http://www.linuxdocs.org/IPCHAINS-HOWTO.html