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Re: new rule
From: Joel Esler <jesler () sourcefire com>
Date: Mon, 29 Apr 2013 10:52:08 -0400

On Apr 27, 2013, at 5:50 AM, Chukhaltsetseg Shijirbaatar <sh_chukha () yahoo com> wrote:

# to detect torrent metafile download
alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg: "P2P torrent metafile download";
content:"|64 38 3a|announce"; flow:established; classtype:policy-violation; sid:1100011; rev:1;)

alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"P2P BitTorrent handshake";
flow:to_server,established; content:"BitTorrent protocol|0000 0000|"; classtype:policy-violation;
sid:1100012; rev:1;)

You may want to look into sids: 2180 and 2181.  These sids are freely available in both the registered ruleset and the 
community ruleset here:

Joel Esler
Senior Research Engineer, VRT
OpenSource Community Manager
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  • new rule Chukhaltsetseg Shijirbaatar (Apr 27)
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