alert tcp $HOME_NET any -> $EXTERNAL_NET 5222 (msg:"ET CHAT Google IM traffic Jabber client sign-on"; flow:to_server; content:"gmail.com"; nocase; content:"jabber.org"; nocase; content:"version="; reference:url,www.google.com/talk; classtype:policy-violation; sid:2002334; rev:5; metadata:created_at 2010_07_30, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)