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# Add a rule to your '''MYICMP''' chain that denies '''ICMP pings''' originating with MAC address of your partner's machine.
# Add a rule to your '''MYICMP''' chain that denies '''ICMP pings''' originating with IP address of your partner's machine.
# Issue '''iptables -L''' to view your firewall rules for your newly-created chains.
# Once you are happy with how your firewall works - make a backup of the original default rules: <source lang='bash'>cp /etc/sysconfig/iptables /etc/sysconfig/iptables.original</source>
# Overwrite the defaults with the current state of the firewall:<source lang='bash'>/usr/libexec/iptables/iptables.init save</source>
