alert tcp $EXTERNAL_NET any -> $HOME_NET !$HTTP_PORTS (msg:"ET POLICY Inbound HTTP CONNECT Attempt on Off-Port"; flow:to_server,established; content:"CONNECT "; nocase; depth:8; content:" HTTP/1."; nocase; within:1000; classtype:misc-activity; sid:2008284; rev:3; metadata:created_at 2010_07_30, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)