alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET POLICY iTunes User Agent"; flow:established,to_server; threshold:type limit, count 1, seconds 360, track by_src; http.user_agent; content:"iTunes"; nocase; depth:6; reference:url,hcsoftware.sourceforge.net/jason-rohrer/itms4all/; classtype:policy-violation; sid:2002878; rev:9; metadata:created_at 2010_07_30, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_22;)