Migration from Plesk 9.5.4 is failed to start. The following error can be found in
System.Net.Sockets.SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond <source_server_IP>:6489
Firewall blocks traffic on source port 6489.
Traffic is filtered by intermediary host.
Check if source server port 6489 is allowed in windows firewall.
Check if it is accessible from destination server. Telnet should establish the connection:
telnet <source_server_IP> 6489
Connecting To <source_server_IP>...