alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET P2P BitTorrent Traffic"; flow:established; content:"|0000400907000000|"; depth:8; threshold:type limit, count 1, seconds 120, track by_src; reference:url,bitconjurer.org/BitTorrent/protocol.html; classtype:policy-violation; sid:2000357; rev:9; metadata:created_at 2010_07_30, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)