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From: Brad Hards <bhards@bigpond.net.au>
To: ebiederm@xmission.com (Eric W. Biederman)
Subject: Re: lan based kgdb
Date: Mon, 18 Nov 2002 07:25:27 +1100
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On Mon, 18 Nov 2002 06:42, Eric W. Biederman wrote:
> As long as the network console/debug interface includes basic a basic
> check to verify that the packets it accepts are from the local network.
This is pretty hard to do in some configurations. You essentially have to do 
this at the router, not at destination.

> And it's outgoing packets have a ttl of one.  I don't have a problem.
Recent IETF work on link-local has used TTL=255 outgoing, and it has to be 255 
at the receive end too. That is a reasonable way to ensure that is is 
link-local, since even the most brain-dead routers will at least decrement 
TTL.

> Otherwise the concept gives me security nightmares.
Computing should give you security nightmares :)

Brad
- -- 
http://linux.conf.au. 22-25Jan2003. Perth, Aust. I'm registered. Are you?
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