You are not the only one. Fresh 8.3 installation, and I changed the IP of the bridge adapter and hosts file in the GUI. Applied changes lost connection. Then I rebooted the server, the old IP was still listed on the banner however I could not communicate over the old ip or new one.
I then from the command line checked the /etc/network/interfaces and it showed the correct IP address, subnet mask and gateway.
I checked the hosts file and it also was updated but I still could not connect. I could not ping out from the server either.
I set another machine to the same IP and plugged into the same switch port the PVE host was plugged into and I could connect and scan the network no problem.
Something is definitely off in the updating of the IP address. Searching the forums was Zero help although it enforced my belief that this problem has existed for far longer than 8.3.
The only way to resolve it was to reinstall the OS. Based on this alone I am not moving forward with Proxmox. Sad really as it looked so promising.
Your tech team really needs to do a better job at the basics of your product. I know most people are going to reply it works for me. That's fine, but if I was a fringe case I would give it second thought, but I see far to many posts over the years of people having the exact same issues. For a product current on its 8th release and 3rd sub version, problems like this should not exist.
No clear documentation in the docs on how to troubleshoot it. Firewall was not enabled either. Very disappointing. Going back to Cockpit with BTRFS, KVM, and Dockge.
I can't stress enough how disappointing this was.
