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SSH
The controller supports the Secure Shell (SSH) cryptographic network protocol for secure data
communication, remote command-line login, remote command execution, and other secure network
services between itself and a networked computer. It is a replacement for Telnet that offers encryption.
The controller’s SSH implementation has been tested using PuTTY. PuTTY is an SSH and telnet client,
developed originally by Simon Tatham for the Windows platform. It is open source software that is
available with source code and is developed and supported by a group of volunteers. Putty can be
downloaded at http://www.putty.org/ . A typical download is the “putty.exe” executable that covers
the Telnet and SSH client.
When connecting to the controller for the first time, PuTTY will alert the user to store the controller’s
security key in the key cache (sample screen below). Select “Yes”, enter a login, and the controller
password, to access the SSH server (the controller). This key will remain valid until the controller’s IP
address is modified.
Below is a sample controller’s screen once the controller’s SSH Server has been accessed. Standard
T1.317 commands can be used.
Figure 36: PuTTY Security Key Warning Screen
Figure 37: PuTTY SSH Login Example Screen
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