scrub all fragment reassemble scrub all fragment reassemble scrub in all fragment reassemble scrub out all fragment reassemble scrub in all fragment reassemble scrub all fragment reassemble block drop all block return all block return-rst proto tcp all pass all pass in all pass out all pass all block drop in all block drop out all block drop all pass in all pass out all block drop on lo0 all pass on lo0 all block drop on lo0 all pass proto tcp all flags S/SA pass proto udp all keep state pass in proto udp all keep state pass out proto udp all keep state pass out on lo0 proto tcp from any to any port = smtp keep state