According to this case, there was a change in the connection type used by the client: modifying the value by creating a configuration file called "h2-engine-override.cfg" under the location: c:\Windows\ServiceProfiles\LocalService\AppData\Local\LogMeIn Hamachi with "Conn. Mask 5" as file contents. The Hamachi tunneling engine service was stopped and "h2-engine.ini" contents were modified to "Conn. Last 1" The service was then restarted again.