Greetings, all.
	I've been lurking on this list for a week or two, and before
I ask questions, I figure that I should at least say first what I'm 
working with.  Here goes:

Hardware:
 Quadra 800
 40 MB RAM
 500 MB int. SCSI disk [Apple] (80 HFS; 40 /; 40 swap; 200 /usr; 140 /var)
 2x CD-ROM [Apple]
 MediaVision PAS-16 NuBus card (not supported, obviously)

Software:
 NetBSD 1.4, complete install
 X-windows (including 256-color binary)
 Ethernet networking on built-in AAUI (sn0)
 Package installed: Netatalk (but not configured yet)


I've got an ADSL connection, so right now I'm logged in on the NetBSD box
from my workstation here at work.  I've got the NetBSD box and my PowerMac
(w/ more to come) on a hub, with the DSL modem on the hub's uplink port. 
I've only been assigned one IP address, and have yet to try "borrowing"
another one (yeah, I know it's naughty) to see if the DSL modem would
allow it.  I have determined that the DSL modem will pass packets from
either machine (same IP address) without being reset, so it apparently
doesn't latch to only the first active MAC address after power-up.

Until I can find a NuBus 10Base-T Ethernet card (that works with NetBSD) 
for the Quadra, I understand that I won't be able to make it a firewall
for the other machine(s) and allow simultaneous 'net connectivity for all
the boxes.  [I do have a 10Base-T 3Com PCI card, but I don't want to make
the PPC MacOS box the gateway machine - plus I can't find MacOS drivers
for the card anyway, and I'd have to buy IPNetRouter or equivalent.]


Finally, here's the question:  Isn't is possible to do IP-NAT on a machine
that only has *one* network interface?  If the PPC MacOS box has one of
the private-only IP address (like 192.168.*.*), then even if it
*physically* is seen by the DSL modem (and possibly the router on the
other side), it'll be ignored past the router, and unreachable from beyond
the router, right?  If the NetBSD box retransmits packets from a private
IP address as a 'legal' one (and vice-versa), wouldn't that then solve my
problem?  If so, how would I go about setting that up?  Would it still be
possible without gated or routed?


[BTW, thanks to all those who contributed to the NetBSD effort, including 
those who've answered and even asked questions on this list.]

/*======================================================================
"Don't die wondering..."                http://www.cldc.howard.edu/~cpg
                                              email: cpg@scs.howard.edu
chris out-              Christopher P. Gill
  peace.        C.L.D.C. Senior System Operator (Ret.)
======================================================================*/