alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET WEB_CLIENT PROPFIND Method Xbit Set"; flow:established,to_server; xbits:set, ET.PROPFIND, track ip_src, expire 360; noalert; http.method; content:"PROPFIND"; nocase; classtype:misc-activity; sid:2049314; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_11_27, deployment Perimeter, deployment SSLDecrypt, performance_impact Significant, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_11_28;)