linux-kernel - Re: How would I do this? (expert tricks) OT

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Message-ID: <Pine.LNX.4.64.0706191852360.5731@fbirervta.pbzchgretzou.qr>
Date:	Tue, 19 Jun 2007 18:54:21 +0200 (CEST)
From:	Jan Engelhardt <jengelh@...putergmbh.de>
To:	Marc Perkel <mperkel@...oo.com>
cc:	linux-kernel@...r.kernel.org
Subject: Re: How would I do this? (expert tricks) OT


On Jun 19 2007 09:48, Marc Perkel wrote:
>
>I have a server with port 25 closed. I was to be able
>to run a script every time someone tries to connect to
>port 25, but from the outside the port remains closed.
>I need the script that I'm going to run get the IP
>address that tried to connect.
>
>I know it's off topic but it's part of an experiment
>to stop spam. 

tcpdump -lni any port 25
iptables -p tcp --dport 25 -j NFQUEUE
...



	Jan
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