PF Configuration - FreeBSD Release 9.0 x64

Tue Sep 11 08:17:00 UTC 2012

Dear FreeBSD Guys,

It is FreeBSD Release 9.0 x64 and i see this log very frequent almost 
every second, And i want to block this IP from reaching my server. i 
configured the PF as following but still see the same logs, it is like 
it did not work.

block in log quick from 41.211.2.239/32 to any

Sep 11 07:49:56 titan avahi-daemon[1567]: Received response from host 
41.211.2.239 with invalid source port 4331 on interface 'em0.0'
Sep 11 07:50:25 titan avahi-daemon[1567]: Received response from host 
41.211.2.239 with invalid source port 38627 on interface 'em0.0'
Sep 11 07:51:29 titan avahi-daemon[1567]: Received response from host 
41.211.2.239 with invalid source port 38627 on interface 'em0.0'