alert tcp $HOME_NET any -> $EXTERNAL_NET 16680 (msg:"ET POLICY OperaUnite URL Registration"; flow:to_server,established; content:"REGISTER"; offset:0; depth:8; content:"operaunite.com"; within:109; reference:url,unite.opera.com; classtype:policy-violation; sid:2009895; rev:3; metadata:created_at 2010_07_30, confidence High, signature_severity Informational, updated_at 2019_07_26;)