| pass in on ed0(!) proto tcp from 127.0.0.1/32 to 127.0.0.1/32 port = 23 flags S/SA | |
| block in on lo0(!) proto tcp from any to any flags A/0xff | |
| pass in on lo0(!) proto tcp from any to any flags /SPA | |
| block in on lo0(!) proto tcp from any to any flags 0x80/A |