Subject explains it all
In Ubuntu MATE 22.04. Installed Virtual Machine Manager which did all the setup. Everything was working fine. For some reason I was fiddling with network connections and screwed it up royally - none of my VMs connect to the internet.
Does anyone now the default settings for this?
I think I have narrowed it down to the vnet0 setup for which I can’t tell what to choose from. In another rig where I have this set up the options are far fewer than a new config
Were you using bridged networking or the default NAT?
If you used the default NAT, you should be able to rebuild it by right-clicking QEMU/KVM → Details → Virtual networks. Hit the + to add another NAT network