alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET POLICY Unsupported/Fake Internet Explorer Version MSIE 4."; flow:established,to_server; threshold:type limit,track by_src,count 2,seconds 60; http.user_agent; content:"|20|MSIE 4."; fast_pattern; nocase; http.host; content:!".weatherbug.com"; endswith; content:!".wxbug.com"; endswith; classtype:policy-violation; sid:2016871; rev:8; metadata:created_at 2013_05_21, deprecation_reason Age, confidence High, signature_severity Informational, updated_at 2024_02_01, reviewed_at 2024_02_01;)