full-disclosure - Interesting idea for a covert channel or I just didn't research enough?

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Date: Thu Oct  6 18:52:20 2005
From: jurjen at stupendous.org (Jurjen Oskam)
Subject: Interesting idea for a covert channel or I just
	didn't research enough?

On Thu, Oct 06, 2005 at 10:06:24AM +0100, PASTOR ADRIAN wrote:

>    Please, if you know anything related to backdoors intercepting
>    commands from log files send me some links. Ideas, comments and flames
>    are more than welcome :-) .

I myself use this method to open up the SSH port for a particular IP
address. When you try to open a particular URL on my website, you get a 404
because that document doesn't exist. The webserver logs this. A script in
the background sees in the log that this happened, and opens up port 22 to
the IP address which requested the non-existant URL.

-- 
Jurjen Oskam