full-disclosure - Code for ban IP adresses inmediately

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From: Valdis.Kletnieks at vt.edu (Valdis.Kletnieks@...edu)
Subject: Code for ban IP adresses inmediately 

On Sat, 11 Oct 2003 16:19:10 +0200, Lorenzo Hernandez Garcia-Hierro said:

>   if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {
>     $clip = $_SERVER['HTTP_X_FORWARDED_FOR'];
>   }
>   elseif (isset($_SERVER['HTTP_VIA'])) {
>     $clip = $_SERVER['HTTP_VIA'];
>   }
(more code snipped).

Soooo... let's see... if I feed this thing something that has *both*
a legitimate X_FORWARDED_FOR and a malicious VIA, this code
will only check the FORWARDED.  I think you really wanted to do

for i in (FORWARDED VIA REMOTE_ADDR) do
	if (isset($_server($i)) banit($_server($i)....)
done

or however you do it in PHP.
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