Fake Internal IP Address Ranges

[Jeff Wirth]

> Does FreeBSD refuse to route fake internal address ranges?
> 

by 'fake' I assume you are referring to RFC1918
(http://www.faqs.org/rfcs/rfc1918.html)

> I have a setup as follows:
> Ethernet0 (10.0.0.0 address, internet-facing)

Having a RFC1918 address as your internet-facing address is not going
to work unless you have a 'NAT'ing device in front of it.

> 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?

no OS that I know of (including FreeBSD) treats RFC1918 addresses
differently then any other.

- jw