Unable to connect via SSH using Plesk SSH Terminal extension: Connection refused

Symptoms

Unable to connect to a server via SSH using Plesk SSH Terminal extension:

SSH: connect to host 127.0.0.1 port 9999: Connection refused

Cause

Direct change of SSH service port number was not applied for Plesk SSH Terminal extension.

Resolution

1. Connect to the server via SSH.

2. Execute below command to re-read SSH service configuration:

   # /usr/local/psa/admin/sbin/modules/ssh-terminal/installer --update-configuration

3. Restart plesk-ssh-terminal service to apply changes:

   # systemctl restart plesk-ssh-terminal