SKUs: AT-UHD-PRO3-44M, AT-UHD-PRO3-66M, AT-UHD-PRO3-88M, AT-UHD-PRO3-1616M
Subject: SSH on the UHD-PRO3 Series—This article provides SSH configuration information.
If your Web GUI is unavailable and you are unable to connect to your UHD-PRO3 via Telnet, SSH may be enabled.
Enabling SSH on the UHD-PRO3 series will disable Telnet and the Web GUI.
To disable SSH, you will either need to connect to your UHD-PRO3 via SSH to disable the SSH server, connect via RS-232, or perform a factory reset.
Connecting via SSH
Use Windows Command Prompt or a Mac/Linux terminal window for the following commands:
ssh -oHostKeyAlgorithms=+ssh-dss root@<device IP address>
Where <device IP address> is the IP address of your UHD-PRO3. For example,
You will be asked to continue connecting:
Then enter your password. The default password is Atlona.
You will then have a command prompt. You can enter the same commands here as you would for an RS-232 connection. To disable SSH, use this command:
More commands are available from the UHD-PRO3 API (PDF).
Disabling SSH via RS-232
For information on connecting via RS-232, see the following article:
KB01177 - How to use Hterm (free serial program)
Once you are connected to your UHD-PRO3, the following command will disable SSH:
You can also check the SSH status:
Disabling SSH with a Factory Reset
If you are unable to connect to your UHD-PRO3, and you are running a firmware later than version 13 (released 3/17/2016), you can use the front panel buttons to perform a factory reset to enable the web gui. This will erase all of your settings on the UHD-PRO3.
Simply hold the EDID and INFO buttons down together for 5 seconds to perform the factory reset. If you are using a firmware prior to version 13, you must connect via RS-232 to perform the factory reset. See the following article for more information:
KB01077 - How to Reset AT-UHD-PRO3 Matrix
Article ID: KB01613