From: "Gáspár Lajos" <swifty@freemail.hu>
To: Michal Martinek <michal.martinek@siemens.com>
Cc: netfilter@lists.netfilter.org
Subject: Re: netfilter_queue: how to obtain address info from queued packet
Date: Tue, 23 Jan 2007 12:49:11 +0100 [thread overview]
Message-ID: <45B5F637.5030502@freemail.hu> (raw)
In-Reply-To: <45B5E630.6000305@siemens.com>
Michal Martinek írta:
>
> Thanks, I was too fast to answer without looking into man pages:-).
> But this module would just save me some work with analyzing packets.
> The problem is that I would like to detect video stream in which I can
> recognize only some "key packets". The rest is (for me)
> unrecongnizable and I only know that they are coming from/to the same
> port.
>
Well... It is not really clear to me what you want... :-) (Blocking some
"communication" :-) .)
You can drop the whole connection when you detect for example a header
of a video stream....
This could be dangerous because you would drop some legitimate traffic too.
That is why you have to narrow your matching criterias. (eg.: adding
some rules like "-i eth0" or "-s 192.168.0.1")
An other good thing to look after is the l7 patch:
http://l7-filter.sourceforge.net/HOWTO
But there may be better solutions if you would clarify more your needs :)
Swifty
next prev parent reply other threads:[~2007-01-23 11:49 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-23 10:03 netfilter_queue: how to obtain address info from queued packet Michal Martinek
2007-01-23 10:10 ` Gáspár Lajos
2007-01-23 10:18 ` Michal Martinek
2007-01-23 10:27 ` Gáspár Lajos
2007-01-23 10:40 ` Michal Martinek
2007-01-23 11:49 ` Gáspár Lajos [this message]
2007-01-23 10:31 ` Cedric Blancher
2007-01-23 11:53 ` Michal Martinek
2007-01-23 12:33 ` Cedric Blancher
2007-01-23 12:50 ` Michal Martinek
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