Ken,

>I don't remember your previous post on this problem, but it's kinda
>hard to tell your network topology, what works, and what doesn't, from
>the description below.

What's so hard to understand?  I have an ethernet here, and all my 
machines attach to it, either on thinwire, or via UTP and a hub.
Real tough to understand.  Everything else works UNTIL I try to connect
from the Mac running NetBSD.  That kills the link completely.  Whats so
hard to understand about that?  It isn't real complicated.
>
>> Here it is: I often use a Linux box as my router when connecting to work.
>
>So you have a LAN at home and the Linux box is the router.  Ok, so
>far.  Is the problematic Mac hooked up on the LAN?
>
Certainly, how else would it get to the router ?  It wouldn't do much 
good to try to connect from a machine that wasn't on the network!

>> Under certain circumstances, attempting to telnet from this Mac running
>> NetBSD to a system at work, crashes the link (PPP) between that Linux box
>> and work.
>
>When you say "it crashes", exactly what happens?  pppd gets killed?

The modem hangs up the line, and the pppd is no longer running.

>Or carrier gets dropped?  If it's the carrier, do you have any idea
>which end (your Linux box or the modem at work) drops it?
>
>Also, does only telnet do it?  Or any other app?
>
>> THE ONLY SYSTEM THAT CRASHES THE LINK IS NETBSD!  Does anyone know
>> why this happens, or can take a stab at it?
>
>I'm sorry to say this, but there are too many variables involved here
>even to speculate what's going wrong.

Nonsense!  The link works for hours on end UNTIL I try to telnet from
the Mac running NetBSD.  I can ftp, lynx, or Mosaic thru this link 
when running ANYTHING except NetBSD!  The Linux box is running as a
maquerading router (NAT), which hides my home ethernet behind a single
IP address.  Everything else works fine; other Mac's running 7.6, other
Mac's running 8.0, a laptop running either WFW or Linux, all connect
fine thru the router (Linux box) to anything.

ONLY NETBSD KILLS the link!  You're making it more complicated than
it is.  It really is as simple as that.  Everything else works.  NetBSD
doesn't, and it kills the link.  Simple as that.

Paul