Migration fails to start the connection:

Unable to log in to the source server ‘source’ ( by SSH service: administrator login and/or password are not correct. Set valid SSH credentials for the server and click “Prepare migration”.


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As a workaround use a key with 256 length

  1. Connect to the server via SSH;
  2. Create the key pair

ssh-keygen -t ecdsa -b 256

Generating public/private ecdsa key pair.
Enter file in which to save the key (/root/.ssh/id_ecdsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /root/.ssh/id_ecdsa.
Your public key has been saved in /root/.ssh/
The key fingerprint is:

Copy the key to the Source server:

ssh-copy-id -i /root/.ssh/ [email protected]

Restart the migration