alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET CHAT Skype VOIP Checking Version (Startup)"; flow:to_server,established; http.uri; content:"/ui/"; nocase; content:"/getlatestversion?ver="; nocase; reference:url,www1.cs.columbia.edu/~library/TR-repository/reports/reports-2004/cucs-039-04.pdf; classtype:policy-violation; sid:2001595; rev:12; metadata:created_at 2010_07_30, signature_severity Informational, updated_at 2020_09_02;)