[LARTC] Advanced routing question.

[Daniel Jay Jay.Daniel@HCAhealthcare.com]

<PRE>I saw the example from 'Can't use two links on a linux box -
correction/addition' but there were a couple of differences in his setup tha
concerned me, first was he was only running NAT on 1 of his 2 connections.

My second and more important concern with using NAT and Linux is how do you
make sure that if X computer starts a UDP connection with the outside world
that all traffic on that connection comes from the same outside IP address
(be it the dsl line or the T1 line)?

-----Original Message-----
From: Arthur van Leeuwen [mailto:<A HREF="mailto:arthurvl@sci.kun.nl">arthurvl@sci.kun.nl</A>]
Sent: Tuesday, January 16, 2001 3:39 AM
To: Daniel Jay
Cc: '<A HREF="mailto:lartc@mailman.ds9a.nl">lartc@mailman.ds9a.nl</A>'
Subject: Re: [LARTC] Advanced routing question.


On Mon, 15 Jan 2001, Daniel Jay wrote:

[snip]


Yes. Linux using Advanced Routing can be used to solve these problems, but
for problem 2: at the IP level there is no way to figure out wether or not a
link is down. Ofcourse, you can approximate problem 2, but you have no
guarantees that the problem lies with the link and not with the servers you
test your connectivity against, or the infrastructure to those servers
beyond your direct link.

There have been some postings on the mailing list on exactly the kind of
setup you want. Look into the threads 'Can't use two links on a linux box'
and 'Can't use two links on a linux box - correction/addition' in the 
archives at <A HREF="http://mailman.ds9a.nl/pipermail/lartc/2000q4/thread.html">http://mailman.ds9a.nl/pipermail/lartc/2000q4/thread.html</A>

Doei, Arthur. (Maybe I should 'steal' some of my boss' time to write this
               stuff up for the HOWTO...)

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</PRE>