1block in proto icmp from any to any icmp-type echo 2pass in proto icmp from any to any icmp-type echo 3block in proto icmp from any to any icmp-type unreach code 3 4pass in proto icmp from any to any icmp-type unreach code 3 5block in proto icmp from any to any icmp-type echorep 6pass in proto icmp from any to any icmp-type echorep 7pass in proto icmp all icmp-type maskreq keep state 8pass in proto icmp all icmp-type timest keep state 9pass in proto icmp all icmp-type inforeq keep state 10