While testing out the graphical tool "firestarter" I noticed that it creates a TTL match rule with no target. iptables -L -n I get: Chain OUTPUT (policy DROP) target prot opt source destination DROP all -- 0.0.0.0/0 0.0.0.0/0 state INVALID all -- 0.0.0.0/0 0.0.0.0/0 TTL match TTL == 64 ACCEPT icmp -- 192.168.1.0/24 0.0.0.0/0 There is no chain named " ". Is this unusual? What happens to packets that match the TTL rule? Thanks for any input! Robert