Here's my situation:

I have a NetBSD-1.5.2 machine acting as a router.  The network setup looks
approximately like this:

Ethernet LAN (A real class C subnet)
    |
    V
NetBSD router
    |
    V
Ethernet DMZ network (10.255.255.0/24)
    |
    V
Cisco 1605
    |
    V
T-1 line to the internet

The setup works great, with one exception -- the router can't make outgoing
network connections.  Any connections from the router to the outside world
have a source address in the 10.255.255.0/24 range, since that's the
interface they're routed through.  Incoming connections from the internet
work fine.

The IP address assigned to the same machine's internal interface is real and
routable, and if I could convince outgoing connections to use it as a
source, I think everything would work fine.

Is there a way to do this on NetBSD-1.5.2?

I've found a couple of discussions about potential solutions to similar
problems in the mailing list archives, but I didn't see anything concrete.

Thanks,
-- monroe
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Monroe Williams                                  monroe@criticalpath.com