I set up Ubuntu 18.04 to be able to use RDP from a Windows machine to Ubuntu. In order to get a Windows machine to RDP to Ubuntu 18.04 user has to be logged off the Ubuntu machine.
When I log off Ubuntu with wifi turned off and try to ping the wired network connection ping says the host is unreachable. When I log into Ubuntu then the wired connection is reachable. Ping gives me a 1ms reply time.
With Wifi I can RDP into the Ubuntu machine when I am logged off.
Why is the wired connection unreachable when I am not logged on?