Firewalls: Source Routing

Firewalls
(September 1996)

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Subject:	Source Routing
From:	"R. McMahon" <mcmr @ mailhost . net>
Date:	Sat, 21 Sep 1996 13:44:44 -0400
To:	firewalls @ greatcircle . com, cisco @ spot . Colorado . EDU
Reply-to:	mcmr @ mailhost . net

Based on a couple of references on building firewalls, I found out the
source routing enabled can present problems for those administrators
that are performing packet filtering on either IP or ports.  I use CISCO
routers (7000, 4500, 2500).  

1. Could someone please explain this kind of vulnerability?

2. Do CISCO routers have souce routing enabled by default?

Thanks in advance
-- 
Mailto:mcmr @
 mailhost .
 net

Follow-Ups:

Re: Source Routing
From: Thomas Lopatic <lopatic @ dbs . informatik . uni-muenchen . de>

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