very fast network logon cracker

 Hydra is a parallelized login cracker which supports numerous protocols
 to attack. It is very fast and flexible, and new modules are easy to add.
 .
 This tool makes it possible for researchers and security consultants to
 show how easy it would be to gain unauthorized access to a system
 remotely.
 .
 It supports: Cisco AAA, Cisco auth, Cisco enable, CVS, FTP, HTTP(S)-FORM-GET,
 HTTP(S)-FORM-POST, HTTP(S)-GET, HTTP(S)-HEAD, HTTP-Proxy, ICQ, IMAP, IRC,
 LDAP, MS-SQL, MySQL, NNTP, Oracle Listener, Oracle SID, PC-Anywhere, PC-NFS,
 POP3, PostgreSQL, RDP, Rexec, Rlogin, Rsh, SIP, SMB(NT), SMTP, SMTP Enum,
 SNMP v1+v2+v3, SOCKS5, SSH (v1 and v2), SSHKEY, Subversion, Teamspeak (TS2),
 Telnet, VMware-Auth, VNC and XMPP.