Subject: Re: IPNAT Questions
To: None <firstname.lastname@example.org>
From: J. Buck Caldwell <email@example.com>
Date: 03/16/2000 16:01:11
Wes Zuber wrote:
> On Thu, 16 Mar 2000, you wrote:
> > So the IPNAT FAQ is showing up as lost on the NetBSD page, of course,
> > just when I decide to set up NAT. I'm trying to set up a NAT server in
> > the following environment, and would appreciate any help possible.
> > NAT server is a i386 (most recent snapshot) box with ex0 on the Internet
> > and ex1 on the private network. ex0 is bound to 126.96.36.199, and
> > expects to route to a DSL modem at 188.8.131.52 (mask 255.255.255.248).
> > ex1 is bound at (currently) 192.168.0.251 (possibly moving to
> > 192.168.0.1 when going live). Also, there is a Cisco router sitting at
> > 192.168.0.250 that's routing several other networks (192.168.x.0/24,
> > where x is the site ID) over Frame Relay. Each of those sites also needs
> > access across this NAT server.
> > So far, I've got:
> > ipf.conf:
> > block in all
> > pass in all
> > ipnat.conf:
> > map ex1 192.168.0.0/16 -> 184.108.40.206/32 portmap tcp/udp 20000:30000
> Try something like:
> map ex0 192.168.0.0/16 -> 220.127.116.11/32 proxy port ftp ftp/tcp
> map ex0 192.168.0.0/16 -> 18.104.22.168/32 portmap tcp/udp 20000:30000
> map ex0 192.168.0.0/16 -> 22.214.171.124/32
> Do a ipnat -CF to flush and ipnat -f /etc/ipnat.conf or whatever the filename
> is that contains the nat rules. The ftp stuff is so that users can use active
> transfer mode with ftp. If you leave it out then your users will have to use
> passive mode. Also use ipnat -l to make sure that the rules loaded up. You
> should start to see some active sessions as well.
That did the trick! I actually noticed just before I got your reply that I
proabably had the wrong interface on there, but your extra help has surely saved
the day. Many Thanks! Blessings upon you and your household!
> > Nothing works, however. I can ping the internal side, but nothing on the
> > external, no web traffic, nothing seems to pass. I've also tried
> > enabling net.inet.ip.forwarding, but that doesn't seem to do it. It does
> > allow me to ping the public side, but that's not meaningful.
> > Last note - I'm running routed so the server exchanges RIP info with the
> > Cisco. Interesting side note - routed doesn't seem to load
> > automatically, even if it's set YES in rc.conf. Working on that.
> If you are only worried about a couple of routes then running RIP is not really
> needed. How about just adding a couple of statics. You can turn off routed
> (which I think is old) and just do something like:
Actually, I'd prefer to use RIP for now. There are going to end up being about 22
nodes on this frame cloud, and multiple routes between them. But thanks for the