alert tcp $HOME_NET any -> $EXTERNAL_NET 443 (msg:"ET POLICY Google Talk TLS Client Traffic"; flow:established,to_server; content:"gmail.com"; nocase; content:"jabber"; nocase; distance:64; within:78; reference:url,talk.google.com; reference:url,www.xmpp.org; classtype:policy-violation; sid:2002330; rev:4; metadata:created_at 2010_07_30, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)