Re: Interesting idea for a covert channel or I just didn't research enough?

[Polarizer <Polarizer () Codixx Com>]

> 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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