alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO HTTP POST Request to Suspicious *.gdn Domain"; flow:established,to_server; http.method; content:"POST"; http.host; content:".gdn"; fast_pattern; endswith; classtype:bad-unknown; sid:2025097; rev:4; metadata:created_at 2017_12_03, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_16;)