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Re: Interesting idea for a covert channel or I just didn't research enough?
From: Polarizer <Polarizer () Codixx Com>
Date: Fri, 07 Oct 2005 09:47:05 +0200

The scenario is the following. The victim is a host with a host-level firewall which is blocking *all* incoming traffic. Somehow the attacker still needs to communicate with a backdoor planted in this host.

Sounds to me like another variation of port knocking[1].

[1] http://www.linuxjournal.com/article/6811

the polarizer
http://www.codixx.de/polarizer.html

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