Subject: Re: tech-net : NAT 1:1 mappings
To: None <>
From: Jens A Nilsson <>
List: tech-net
Date: 04/04/1999 09:44:05
Chris Jones <>,wrote on Apr 02, 1999 at 11:26 -0700: 
> I'm trying to get NAT working with a 1:1 mapping of external to
> internal IP addresses.  I'd like to get it to pass through incoming
> connections to the appropriate internal IP.
> I've got my NAT machine at, and I want to make it
> forward packets for from de0 to on de1.
> But, of course, if I "ifconfig de0 alias", the NAT
> machine starts accepting packets for the hidden machine.
> If I use a "map" rule in ipnat.conf, it only works for outgoing
> connections.  Once the connection is established, packets can go in
> both directions; but I'd like it to allow incoming connections, too.
> I can use "rdr de0 port 23 -> port 23 tcp",
> but I have to specify that for each service on the machine.  Making
> things like NFS work becomes a real pain this way.
If you use port 0 all ports will redirected the way you want.

mvh Jens