FreeBSD this_server 10.3-RELEASE-p11 FreeBSD 10.3-RELEASE-p11 #0: Mon Oct 24 18:49:24 UTC 2016
IPFW seems to be full of ghosts for me. Here is an example.
First the evidence of blocking with my IP sanitized:
security.2.bz2:Feb 5 02:12:26 this_server kernel: ipfw: 552 Deny TCP 198.199.118.158:50479 xxx.xxx.xxx.xxx:110 in via vtnet0
The rule:
ipfw list | grep "552"
00552 deny log ip from table(1) to any dst-port 110
IPFW table dump zoomed (edited) into critical area:
ipfw table 1 list | sort -V | grep "198.1"
198.183.138.0/24 0
200.198.176.0/20 0
Thus the IP address is not range and shouldn't be blocked. This looks like a solid investigation to me, so I wonder if there is a bug in the virtualizing software.
ipfw list | grep 110