I have a FreeBSD box that has 3 nic's.
2 of them are connected to separate internet connections, and the 3rd is
a lan.
When data is coming in over one of the connections, it comes over the
nic to which that ip is assigned, but, outgoing traffic, even if bound
to the second nic, always going out
This is not all that surprising
The behavior you are talking about, blocking entire isp's and blocks of
ips, is the same as the other service you mentioned earlier, SPEWS.
SPEWS has blocked 2 entire c-classes at my isp, preventing my company
from sending mail to many large email sites, like
