From: Kristian Evensen <kristian.evensen@gmail.com>
To: aragonx@dcsnow.com
Cc: netfilter@vger.kernel.org
Subject: Re: Identifiying and modifying packets
Date: Thu, 26 Mar 2009 20:23:32 +0100 [thread overview]
Message-ID: <49CBD634.4000203@gmail.com> (raw)
In-Reply-To: <e4bd24ae0b0148637ca48bf14e29b27a.squirrel@www.dcsnow.com>
Hi,
> Can someone tell me what tools I could use to examine outbound packet data
> for the usernames and modify it if it matches a list of accounts we want
> to block?
>
>
I suggest writing your own netfilter-module that does the packet
inspection, and if a packet matches you can simply return NF_DROP to
instruct the kernel to drop the packet. A good tutorial/book is
available here: http://jengelh.medozas.de/
Maybe you can do something similar with libpcap, but I am not sure if
you can drop packets.
-Kristian
next prev parent reply other threads:[~2009-03-26 19:23 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-26 18:24 Identifiying and modifying packets aragonx
2009-03-26 19:23 ` Kristian Evensen [this message]
2009-03-26 19:43 ` aragonx
2009-03-26 20:45 ` Kristian Evensen
2009-03-26 20:54 ` Verify rules Scott Miller
2009-03-26 23:35 ` Mike Wright
2009-03-27 8:05 ` Mart Frauenlob
2009-03-27 17:15 ` Scott Miller
2009-03-27 18:49 ` Mike Wright
2009-03-27 18:58 ` Mike Wright
2009-03-27 19:49 ` Scott Miller
2009-03-27 19:55 ` Mike Wright
2009-03-27 20:12 ` Scott Miller
2009-03-27 22:49 ` Mart Frauenlob
2009-03-27 19:56 ` Mike Wright
2009-03-27 19:25 ` Rob Sterenborg
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