[FTPD] Failed authentication - Brute force [5/5]

drop any $EXTERNAL_NET any -> $HOME_NET any (msg:"[FTPD] Failed authentication - Brute force [5/5]"; content: "failed authentication from"; nocase; xbits: set,brute_force,track ip_src, expire 21600; default_proto: tcp; default_dst_port: $FTP_PORT; classtype: brute-force; program: ftpd
| ftp
| FTP
| FTPD; after: track by_src, count 5, seconds 300; threshold: type suppress, track by_src, count 1, seconds 300; sid:5000193; rev:13;)