Before:
(IPv4/IPv6 addresses are attached to vtnet0):
ipfw config:
00100 0 0 count log icmp from me to me
00200 0 0 count log ipv6-icmp from me to me
ping -c1 10.111,0.12
ping6 -c1 2a02:6b8:0:415::12
**BEFORE**:
ipfw: 100 Count ICMP:8.0 127.0.0.1 10.111.0.12 out via lo0
ipfw: 100 Count ICMP:8.0 127.0.0.1 10.111.0.12 in via lo0
ipfw: 100 Count ICMP:0.0 10.111.0.12 127.0.0.1 out via lo0
ipfw: 100 Count ICMP:0.0 10.111.0.12 127.0.0.1 in via lo0
ipfw: 200 Count ICMPv6:136.0 [fe80::1] [fe80::5054:ff:fe04:1789] in via vtnet0
ipfw: 200 Count ICMPv6:128.0 [2a02:6b8:0:415::12] [2a02:6b8:0:415::12] out via lo0
ipfw: 200 Count ICMPv6:128.0 [2a02:6b8:0:415::12] [2a02:6b8:0:415::12] in via vtnet0
ipfw: 200 Count ICMPv6:129.0 [2a02:6b8:0:415::12] [2a02:6b8:0:415::12] out via lo0
ipfw: 200 Count ICMPv6:129.0 [2a02:6b8:0:415::12] [2a02:6b8:0:415::12] in via vtnet0
AFTER:
100 Count ICMP:8.0 127.0.0.1 10.111.0.12 out via lo0
100 Count ICMP:8.0 127.0.0.1 10.111.0.12 in via lo0
100 Count ICMP:0.0 10.111.0.12 127.0.0.1 out via lo0
100 Count ICMP:0.0 10.111.0.12 127.0.0.1 in via lo0
200 Count ICMPv6:136.0 [fe80::1] [fe80::5054:ff:fea5:2b2a] in via vtnet0
200 Count ICMPv6:128.0 [2a02:6b8:0:415::12] [2a02:6b8:0:415::12] out via lo0
200 Count ICMPv6:128.0 [2a02:6b8:0:415::12] [2a02:6b8:0:415::12] in via lo0
200 Count ICMPv6:129.0 [2a02:6b8:0:415::12] [2a02:6b8:0:415::12] out via lo0
200 Count ICMPv6:129.0 [2a02:6b8:0:415::12] [2a02:6b8:0:415::12] in via lo0