Rule History

alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"ET CHAT Yahoo IM conference invitation"; flow: from_server,established; content:"YMSG"; nocase; depth: 4; content:"|00 18|"; offset: 10; depth: 2; classtype:policy-violation; sid:2001256; rev:5; metadata:created_at 2010_07_30, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)