there's several networks connected to mine that can't see the FreeBSD server. for example, 10.1.1.0, 10.7.1.0, and others. They RTo on trying to ping the 10.10.10.45 address, the address on the second NIC in the FreeBSD machine. on my network (10.10.10.0) i can ping the IP and in fact pull up the webpage from Apache - no problem.

it's as if the router (10.10.10.1) isn't picking up the address as being on its network. would that be the case if the NIC doesn't have a default gateway?