Re: [Call-home] draft now posted; BoF?

Juergen Schoenwaelder <j.schoenwaelder@iu-bremen.de> Wed, 28 September 2005 05:53 UTC

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Date: Tue, 27 Sep 2005 23:52:10 +0200
From: Juergen Schoenwaelder <j.schoenwaelder@iu-bremen.de>
To: Wes Hardaker <wes@hardakers.net>
Subject: Re: [Call-home] draft now posted; BoF?
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References: <4337FBB5.4010701@cisco.com> <20050926210654.GA3067@boskop.local> <43391200.1020806@cisco.com> <sdy85iocsw.fsf@wes.hardakers.net> <20050927143210.GB1586@boskop.local> <sdirwmgp7r.fsf@wes.hardakers.net>
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On Tue, Sep 27, 2005 at 02:44:56PM -0700, Wes Hardaker wrote:
 
> I promise you that user/pass credentials are not sent until after the
> user verifies that it's talking to a server it trusts.  Asymmetric
> cryptography (X.509, eg) can be used independent of ordering but
> tacking on raw username and password through a negotiated tunnel can
> not.  To do anything else would allow for man in the middle.

Can you translate that into something I can understand? How can I
mount a man in the middle attack if the client/server roles are not
determined by who sent the first SYN?

/js

-- 
Juergen Schoenwaelder		    International University Bremen
<http://www.eecs.iu-bremen.de/>	    P.O. Box 750 561, 28725 Bremen, Germany

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