Hydra is a parallized login hacker utility. Hydra can brute force attack on 
FTP, POP3, IMAP, Telnet, HTTP Auth, NNTP, VNC, ICQ, Socks5, PCNFS and more 
services within SSL support. This port is provided as a standalone program to
avoid installing a full Nessus scanner system.

NEWS: Hydra is now included in Nessus!

WWW: http://www.thc.org/releases.php