Fake Internal IP Address Ranges

[Andrew Lewis]

Hi,

Does FreeBSD refuse to route fake internal address ranges?

I have a setup as follows:
Ethernet0 (10.0.0.0 address, internet-facing)
Ethernet1 (196.funny address, LAN-facing)

We had broken our routing to accomodate the funny range, and it was working fine, until we put in the FreeBSD firewall. Tcpdump doesn't see packets for this range arriving anymore on the internet-facing interface... :(

Is it fBSD thats breaking it? And if so, how can I turn off this behaviour?

Thanks,
-AL.