[89386] in North American Network Operators' Group
Re: Security problem in PPPoE connection
daemon@ATHENA.MIT.EDU (Florian Weimer)
Sun Mar 12 14:31:43 2006
From: Florian Weimer <fw@deneb.enyo.de>
To: peter@peter-dambier.de
Cc: NANGO <nanog@merit.edu>
Date: Sun, 12 Mar 2006 20:31:09 +0100
In-Reply-To: <4413E53B.4090601@peter-dambier.de> (Peter Dambier's message of
"Sun, 12 Mar 2006 10:09:15 +0100")
Errors-To: owner-nanog@merit.edu
* Peter Dambier:
> I am connected through this one:
>
> Access-Concentrator: DARX41-erx
> AC-Ethernet-Address: 00:90:1a:a0:01:46
> --------------------------------------------------
>
> I guess dtag.de has got some 8 of them. Everybody
> (almost) offering dsl in germany goes through their
> infrastructure. The ip address range 84.167.0.0/16
> seems to be shared by all of them.
But you've got an ATM PVC to them, haven't you? This is a completely
different setup.
Imagine you haven't got a DSL modem, but just an RJ45 plug in the wall
which leads into a stupid cloud of L2 Ethernet switches, and you still
talk PPPoE to your ISP. AFAICS, this is the kind of network setup the
OP is talking about.
