1block drop all 2block return all 3block return-rst proto tcp all 4pass all flags S/SA keep state 5pass in all no state 6pass out all no state 7pass all no state 8block drop in all 9block drop out all 10block drop all 11pass in all flags S/SA keep state 12pass out all flags S/SA keep state 13block drop on lo0 all 14pass on lo0 all flags S/SA keep state 15block drop on lo0 all 16pass proto tcp all flags S/SA keep state 17pass proto udp all keep state 18pass in proto udp all keep state 19pass out proto udp all keep state 20pass out on lo0 proto tcp from any to any port = smtp flags S/SA keep state 21