@0 pass in all 
@1 pass in all 
@2 pass in proto tcp from any port <= 1024 to any label foo_bar
@3 pass in proto tcp from any to any port = smtp 
@4 pass in inet proto tcp from 10.0.0.0/8 port > 1024 to ! 10.1.2.3 port != ssh 
@5 pass in inet proto igmp from 10.0.0.0/8 to 10.1.1.1 allow-opts