I successfully start the Internet connection on my Ubuntu 19.04 virtual machine (in VirtualBox).
I checked this by connecting to the company's internal page, which is authorized by proxy.
The proxy is configured by Wired settings -> Network Proxy -> Automatic.
There are no other changes on this machine, it is a new installation.
Then I try to wget http://google.com and it gives me The network is inaccessible Error.
After that I try to wget the same site as before with result: Temporary failure of name resolution.
When I restart, I can connect to the first site without problems.
In addition, Network connection the application is launched, Hotspot connection window opens with information Error while resolving "nmcheck.gnome.org": temporary failure of name resolution. inside – I do not know what it is and why it appears.
The question is: what is happening on my virtual machine? Why does the connection seem to be there, and then go?
In addition, a question mark is displayed at the top of the wired connection icon (you do not know if this is related).