i7 revision 1.3 
1pass in on ed0(!) proto tcp from 127.0.0.1/32 to 127.0.0.1/32 port = 23 flags S/SA
2block in on lo0(!) proto tcp from any to any flags A/FSRPAU
3pass in on lo0(!) proto tcp from any to any flags /SPA
4block in on lo0(!) proto tcp from any to any flags C/A
5pass in on lo0(!) proto tcp from any to any flags S/SA
6block in on lo0(!) proto tcp from any to any flags S/SA
7pass in on lo0(!) proto tcp from any to any flags S/FSRPAU
8block in on lo0(!) proto tcp from any to any flags /A
9pass in on lo0(!) proto tcp from any to any flags S/SA
10