1pass in proto tcp from any to any port = 25 flags S/SA keep frags 2block in proto tcp from any to any port = 25 flags S/SA keep frags 3pass in proto udp from any to any port = 53 keep frags 4block in proto udp from any to any port = 53 keep frags 5pass in proto tcp from any to any port = 25 flags S/SA keep state keep frags 6block in proto tcp from any to any port = 25 flags S/SA keep state keep frags 7pass in proto udp from any to any port = 53 keep frags(strict) 8pass in proto tcp from any to any port = 25 keep state(strict) 9