alert tcp $HOME_NET any -> $EXTERNAL_NET 1024: (msg:"ET P2P TOR 1.0 Outbound Circuit Traffic"; flow:established; content:"TOR"; content:"<identity>"; rawbytes; distance:10; within:35; threshold:type limit, track by_src, count 1, seconds 120; reference:url,tor.eff.org; classtype:policy-violation; sid:2002953; rev:5; metadata:created_at 2010_07_30, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)