Mark de Jong wrote:
> Hi,
> 
> I was reading the "How-TO regarding IP-NAT" by Armen Babikyan, 
> armenb@moof.ai.mit.edu and came to the following disturbing line:
> 
> "if you have a cable modem you wish to route data over, be sure to have the 
> correct device number (cable modem and your lan will both be using
> Ethernet, so you will need two Ethernet cards for your machine!) and 
> replace the device number (most likely either ae0 or ae1)."
> 
> Do I really need two ethernet cards for this to work? My goal is to make my 
> MacIIcx my gateway machine for all the rest of my Macs on the net. Up until 
> now I have been running "IPNetRouter" under MacOS, and it works great ... 
> with one ethernet connection.
> 
> Is there anyway to use IP-Nat on NetBSD without the need for two ethernet 
> cards?

most cable modems connect to an ethernet card.  what does yours connect
to?  if it connects to your ethernet card, what are the other machines on
the network connected to?  

in order for a machine to be a gateway, you usually have a setup like:

                            ---------------------------
                            |                         |
	outside world <---->| interface1   interface2 | <------> LAN
                            |                         |
                            |      gateway machine    | 
                            ---------------------------

in your case, interface1 would be the cable modem, and interface2 is
probably an ethernet card.  is this not how your system is set up?

later.

colin