I have a Quadra 700 setup as an IP NAT router running NetBSD 1.4.
It was taking a very long time to open a telnet connection to
the router from the internal network. It turns out the router
was trying to do a DNS lookup of the internal IP address of the
telnet client, querying the DNS server on the external network.
Perhaps you have a similar situation.
I put the IP of the internal machine in /etc/hosts and editted
nsswitch.conf (I think) to put "files" before "dns". That
solved the problem.
The router is using DHCP to get it's external IP. If you have
a static IP you might have to edit /etc/resolv.conf instead.

On 7/19/00 at 14:30, signage@best.com (Samad) wrote:
> This kind of activity is abnormal. When there is internal
> activity in my network,  my modem doesn't send anything. What
> does your ipnat.rules say? Samad
> 
> 
> 
> On Sun, 16 Jul 2000, Herb Singleton wrote:
> > I'm running NetBSD 1.4.2 as an IP NAT router on a Quadra 650
> > with a cable modem. The cable modem is connected on the
> > built-in ethernet (sn0) and I have an internal network on an
> > Nubus ethernet card. The internal network has been assigned
> > one of the IP ranges designated for internal networks. I'm
> > also running sshd on both ethernet interfaces, and Netatalk
> > ASUN on the internal ethernet interface (confirmed with
> > netstat -a). I've shutdown inetd (and commented everything
> > out of inetd.conf just to be safe). I also have ipf set up to
> > block packets on most common ports in and out. I've veryified
> > this using a couple of websites that scan ports.
> > 
> > Everything is working fine but I noticed one oddity: The
> > cable modem has an activity light that flashes when data is
> > sent to/from the internet. However, the activity light also
> > flashes during *internal* activity. If I connect to the
> > NetBSD box over the internal network over Appletalk or SSH,
> > the modem activity light flashes. Any idea if this is normal?
> > 
> > Herb
> > 
> > _______________________________________________________________
> > Herb Singleton
> > hsingleton@mac.com
> > Everything in Acoustics: http://www.cross-spectrum.com