Review:
TTSSH is a free SSH (secure shell) client for Windows, written as an extension for Tera Term Pro. SSH allows secure telnet sessions between your computer and the remote host. To install TTSSH, just extract the files into the Tera Term Pro folder, and create a shortcut on your desktop or task bar pointing to ttssh.exe.
TTSSH has a feature called Host Key Management to protect you from hostile machines pretending to be your server. Everytime you connect to a remote server, the program compares its keys to the previously stored key in your computer.
Another powerful feature of TTSSH is Port Forwarding. The TTSSH manual nicely illustrates how it works: 'You can request that connections to certain ports on the local machine be forwarded across the secure channel to some port on a remote machine. For example, you could request that the local "pop3" port be forwarded to the "pop3" port on some remote machine "mailserver". Then you could select "localhost" as your mail server and use your email program as normal. When the email program tries to fetch mail, it will contact the local machine, and its connection will be redirected to the remote "mailserver".'