I’ve been using Qubes 4.0.x for over a year. I have a handful of network VMs setup:
- the default sys-net
- the default sys-firewall
- the default sys-whonix
- a sys-protonvpn VM I setup
I’ve been able to access internet fine via all network VMs (I never use sys-net directly FWIW), except for this morning. I can still connect to internet on AppVMs using sys-whonix or sys-protonvpn network VMs. However, for AppVMs that connect directly to sys-firewall, they are now unable to get internet connection.
The sys-firewall VM seems to be working normally? Otherwise the sys-whonix connection should not work. There are no firewall rules set up. The VM is running, updated…
How do I begin troubleshooting this?