1pass in proto tcp from any to any port = ssh flags S/SA keep state (source-track global) 2pass in proto tcp from any to any port = smtp flags S/SA keep state (source-track global) 3pass in proto tcp from any to any port = http flags S/SA keep state (source-track rule, max-src-states 3, max-src-nodes 1000) 4pass in proto tcp from any to any port = ntp flags S/SA keep state (source-track rule, max-src-nodes 1000) 5pass in proto tcp from any to any port = pip flags S/SA keep state (source-track global, max-src-states 3) 6