Knowledge Base

Plesk Migrator error: Unable to connect: Authentication failed

Symptoms

Cannot start the migration via the Plesk Migrator, because the following error appears within the Plesk GUI of the destination server:

Failed to check SSH connection to the source server 'source' (203.0.112.0): Unable to connect to '203.0.112.0' by SSH: Authentication failed.
Ensure that the server is up and there are no firewall rules that may block SSH connections to the server, then restart migration.
A direct SSH connection from the destination server to the source server is established normally.

Cause

An incorrect SSH password is specified for the source server root user within the Plesk Migrator, due to which the necessary SSH connection for the migration process cannot be established.

Resolution

Finish the currently initiated Plesk migration process and start it once again afterwards, but this time make sure you are using the correct password for the root user of the source server.