This is totally repeatable, and keeps biting me. Is this a bug or feature?
# ping 127.0.0.1
PING 127.0.0.1 (127.0.0.1): 56 data bytes
64 bytes from 127.0.0.1: icmp_seq=0 ttl=255 time=0.465 ms
64 bytes from 127.0.0.1: icmp_seq=1 ttl=255 time=0.068 ms
--- 127.0.0.1 ping statistics ---
2 packets transmitted, 2 packets received, 0.0% packet loss
round-trip min/avg/max/std-dev = 0.068/0.266/0.465/0.199 ms
# grep skip /etc/pf.conf
set skip on { lo vlan900 carp900 em0 }
# pfctl -Nnf /etc/pf.conf
# pfctl -Nf /etc/pf.conf
# ping 127.0.0.1
PING 127.0.0.1 (127.0.0.1): 56 data bytes
ping: sendto: No route to host
ping: wrote 127.0.0.1 64 chars, ret=-1
ping: sendto: No route to host
ping: wrote 127.0.0.1 64 chars, ret=-1
ping: sendto: No route to host
ping: wrote 127.0.0.1 64 chars, ret=-1
--- 127.0.0.1 ping statistics ---
3 packets transmitted, 0 packets received, 100.0% packet loss
# pfctl -f /etc/pf.conf
# ping 127.0.0.1
PING 127.0.0.1 (127.0.0.1): 56 data bytes
64 bytes from 127.0.0.1: icmp_seq=0 ttl=255 time=0.397 ms
64 bytes from 127.0.0.1: icmp_seq=1 ttl=255 time=0.089 ms
64 bytes from 127.0.0.1: icmp_seq=2 ttl=255 time=0.090 ms
--- 127.0.0.1 ping statistics ---
3 packets transmitted, 3 packets received, 0.0% packet loss
round-trip min/avg/max/std-dev = 0.089/0.192/0.397/0.144 ms
