and if you dislike the thought of not being able to ping your box from your internal net, set up a firewall rule to block icmp echo requests on your external interface. mine is set up with ipchains in a linux box used as my router.
ipchains -A input -i eth1 -s $ALL echo-request -p icmp -l -j DENY
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and if you dislike the thought of not being able to ping your box from your internal net, set up a firewall rule to block icmp echo requests on your external interface. mine is set up with ipchains in a linux box used as my router. ipchains -A input -i eth1 -s $ALL echo-request -p icmp -l -j DENY