alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO POST to Double Slash in URI"; flow:established,to_server; http.request_line; content:"POST|20|//|20|HTTP/1."; startswith; http.header_names; content:!"Referer"; classtype:bad-unknown; sid:2033045; rev:2; metadata:affected_product Any, attack_target Client_Endpoint, created_at 2021_05_28, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_05_28;)