Telnet
From FreeBSDwiki
Telnet is a terminal emulation application designed to allow remote access to machines running the telnetd daemon.
In recent years the use of telnet has dramatically reduced with the introduction of the far more secure ssh.
Common flags
-l <username> -- used to specify the username to use when logging into the remote machine. -n <filename> -- used to create a trace file of the telnet session.
Example usage
[light@splat ~]$ telnet insecure.host.com Trying 10.0.0.1... Connected to insecure.host.com. Escape character is '^]'. Password: [light@insecure ~]$ logout Connection closed by foreign host.