Server Web GUI and VMs not working, Containers seem to work

[DenverCM]

Starting a week or two ago, the GUI/web interface stopped working. I can ping the server and containers (and some containers still seem to be running), but all VMs are off/can't ping or connect. Can't SSH into it either.

After shutting down the server, by holding down the power button, and booting it back up, it seems to work fine for several hours - not sure how long exactly.

I updated Proxmox last night, but this morning, same thing.

Not sure what's going on, anyone have any ideas? Thanks.

 

[Matthias.]

Is there any information in the syslog?
Please provide the output of systemctl status pveproxy.
Please provide the output of cat /etc/network/interfaces.

Are you absolutely certain that the containers are still running, ie can you ssh to them and verify it's the correct container?