alert ftp $EXTERNAL_NET any -> $HOME_NET any (msg:"GPL FTP OpenBSD x86 ftpd"; flow:to_server,established; content:" |90|1|C0 99|RR|B0 17 CD 80|h|CC|sh"; fast_pattern:only; reference:arachnids,446; reference:bugtraq,2124; reference:cve,2001-0053; classtype:attempted-user; sid:2100339; rev:11; metadata:created_at 2010_09_23, signature_severity Unknown, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)