Migration from Direct Admin/cPanel fails: Permission denied, connection unexpectedly closed

Symptoms

• Unable to migrate a domain

  stderr: Permission denied (publickey,gssapi-keyex,gssapi-with-mic,password).
  rsync: connection unexpectedly closed (0 bytes received so far) [Receiver]
  rsync error: unexplained error (code 255) at io.c(605) [Receiver=3.0.9]

  stderr: Permission denied (publickey,password,keyboard-interactive).
  rsync: connection unexpectedly closed (0 bytes received so far) [Receiver]
  rsync error: unexplained error (code 255) at io.c(226) [Receiver=3.1.2]

• Pre-migration checks shows the following errors

  The option "AllowUsers" is used in /etc/ssh/sshd_config on the source server 'directadmin'
  Plesk Migrator creates temporary users on the source server to copy web content in a secure way.
  These users have name starting from "plesk-migrator" and they must have ability to login to the source by SSH.
  To allow these users to login by SSH, fix "Allow users" option so it looks like:
  AllowUsers root plesk-migrator-*

Cause

Misconfigured sshd service.

Resolution

1. Log into the source server via SSH .

2. Edit /etc/ssh/sshd_config and add plesk-migrator-* to AllowUsers

   AllowUsers root plesk-migrator-*

3. Restart SSH service:

   # service sshd restart