[NBLUG/talk] Networking question

[Coy Thorp]

Dave,

	I'm not Kyle, but I will attempt to provide some insight. :)

	What you are doing is asking your desktop to be a router.  It can do
this well enough, but you have to set it up correctly.  The key is to make
it transparent to your laptop.  Your laptop would use the desktop as the
default gateway, and the desktop needs to be intelligent enough to dial your
account, and route traffic for the 'net to and from your laptop.  As long as
the laptop <-> desktop network is number differently that the desktop <->
Internet network, and you are NATing the laptop address, you can route
cleanly without ICMP redirects or any other nastiness.

	To geek even further, you can run a firewall on your desktop and
perform packet filtering for it and the laptop.

	And that's it in a nutshell (heh.  I shoulda wrote this as an
O'reilly pocket reference.  But that assumes that I have knowledge that
people actually want, and I'm nowhere near that presumptuous).  Setting it
up is dependent on what your current settings are, and what things you want
to do.  I recommend using an RFC 1918 address scheme for your laptop <->
desktop network (eg, 192.168.1.0/28), that way you leave some addresses open
for expansion, and it's private and not viewable from the net, as long as
you are address translating at the desktop (didn't I say that already?).

Good luck, and I hope this helps.

-Coy

-----Original Message-----
From: Dave Sisley [mailto:dsisley at arczip.com] 
Sent: Sunday, September 28, 2003 12:27 PM
To: NBLUG
Subject: [NBLUG/talk] Networking question


This question is sort of directed toward Kyle, but anyone can jump in, and I
thought that the answer might prove useful to other people as well.

At the install fest, Kyle mentioned an alternative way to use my home
wireless 
setup, and (like a dope) I'm afraid I forgot to write it down.

The way I am currently using the connection I've set up between my laptop
and my desktop is to ssh into the desktop, ask it to dial out and do all my 
internet related business through that machine.  That works fine for 90% of
my 
needs, plus it's easy enough to transfer files back and forth between the 2 
machines.

Where it is inefficient is when I need to download a file for the laptop
from 
the web. The way it is now, I would download it to the desktop, then scp it
to 
my laptop. That's not so bad, but it feels 'wrong'.  I just realized the
real 
problem is when I want to 'apt-get upgrade' my laptop.  I can't really do
that.

Kyle had mentioned a way for me to actually use the desktop for dialing out,

but I could still be logged into the laptop and just use the desktop's ppp 
connection as if it were the laptop's.

Forgive me if I mistated the scenario.  I'd be happy to do some research,
but 
I forgot the name of the process/concept.  Can I get a hint before I google?

Grateful as always,
-dave.
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