[OPENSSH] Authentication failure - Brute force [10/5]

drop any $EXTERNAL_NET any -> $HOME_NET any (msg:"[OPENSSH] Authentication failure - Brute force [10/5]"; content: "authentication failure"; pcre: "/([1-2]?[0-9]{0,2}\.){3,3}[1-2]?[0-9]{0,2}/"; xbits: set,brute_force,track ip_src, expire 21600; default_proto: tcp; default_dst_port: $SSH_PORT; classtype: brute-force; program: sshd; normalize; parse_src_ip: 1; after: track by_src&by_username, count 10, seconds 300; threshold: type suppress, track by_src&by_username, count 1, seconds 300; sid: 5000016; rev:25;)