alert ftp $EXTERNAL_NET any -> $HOME_NET any (msg:"GPL FTP .forward"; flow:to_server,established; content:".forward"; reference:arachnids,319; classtype:suspicious-filename-detect; sid:2100334; rev:7; metadata:created_at 2010_09_23, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)