alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET POLICY IP Check wtfismyip.com"; flow:to_server,established; http.method; content:"GET"; http.uri; pcre:"/^\/(?:text|json|xml)?$/"; http.host; content:"wtfismyip.com"; endswith; fast_pattern; classtype:policy-violation; sid:2019737; rev:4; metadata:created_at 2014_11_18, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_28;)