Saving firewall rules and starting at boot time

• Run the script as root (sitting at the console!): chmod u+x ipchains.sh ; ./ipchains.sh
• Test: first make sure you can get out (and things like netscape, ssh clients, etc work). Try to get in with another machine, if available (telnet your.machine <port>, for example)
• Use the RedHat rc script to save your rules: service ipchains save (saved in /etc/sysconfig/ipchains)
• Make the ipchains rc script run at boot time: chkconfig --add ipchains
• In a minute we'll see how to add new rules for running services like ssh and for using AFS