alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET P2P Gnutella TCP Ultrapeer Traffic"; flow:established,to_server; content:"GNUTELLA"; depth:8; content:"X-Ultrapeer|3a| True"; nocase; threshold:type both,track by_src,count 5,seconds 3600; classtype:policy-violation; sid:2002761; rev:6; metadata:created_at 2010_07_30, confidence High, signature_severity Informational, updated_at 2019_07_26;)