[1736] in linux-net channel archive
Re: Problem starting gated
daemon@ATHENA.MIT.EDU (Chris Woods)
Tue Jan 30 03:23:25 1996
Date: Mon, 29 Jan 1996 23:22:35 -0500 (EST)
From: Chris Woods <cjwoods@paladin.com>
To: Shawn Ruttledge <ecloud@goodnet.com>
cc: linux-net@vger.rutgers.edu
In-Reply-To: <199601292015.NAA04494@goodguy.goodnet.com>
On Mon, 29 Jan 1996, Shawn Ruttledge wrote:
> But wouldn't dynamic routing on their end fix that (I mean goodnet's end)?
[...]
> The question remains then: is it true or not that a typical ISP does
> dynamic routing and that the result of it is that any addresses which appear
> under the assigned one will be seen as new addresses and automatically added
> to the routing tables? Or do they enforce subnetting, ie check to see if
> a "new" address ought to be under the ISP's subnet before adding it?
No ISP is going to announce routes to a "bogus" (i.e. not "official")
network. Also, ISP's generally do not implement any dynamic routing scheme
with any but the larger customers (i.e., those with routers and a large
official network). One of the larger ISP's (name left out for political
reasons) was using BGP with one of their customers, and BGP'ing to
MAE-East (natch). This customer inadvertently somehow announced a network
of 0.0.0.0. The result was, to say the least, chaotic.
> OK, so assuming that it's not possible for me to get packets back that
> are directed to the ethernet addresses I have assigned my machines, what
> do I do? How about proxy arp? As I understand it, proxy arp forces a
[..]
If you do not have an official network number, but can obtain a single,
static IP address from your ISP, your best bet is to run a proxy server
on your gateway machine with rfc1597 addresses internally. See
ftp://ds.internic.net/rfc/rfc1597.txt.
Chris Woods Systems Administrator
cjwoods@paladin.com Paladin Computing Solutions
617-273-4226 http://www.paladin.com
"Never underestimate the destructive power of a backhoe." -Brent Chapman
