I installed Proxmox over Debian 12 so I could keep my Windows partition on the machine I'm running the server on.
After I installed Proxmox my ethernet did not appear to work on the machine (only wifi worked, which is what I used when installing Proxmox over Debian 12, not sure if that has any reason to do with why the ethernet configuration is broken). At first, the ethernet port didn't work (no lights on the port indicating a connection), but after I modified the interfaces config the lights on the port started working again, but there was still no ethernet single detected. Interestingly, I could still connect to the Proxmox server webUI or over SSH with the ethernet IP (innet). I disconnected from the wifi network to test if it was just prioritizing wifi, however, after doing so my wifi now does not work, it doesn't automatically find my wifi network anymore and now (missing wifi adapter in the Debian network GUI. Listed as down when entering "ip a" into terminal) I can't connect to the internet on the server machine. However, I can still ssh into the server via my ethernet connection ip. To troubleshoot I booted into my Windows installation on the machine, and the wifi works fine, but the ethernet is listed as unidentified network and no internet.
Fixed:
After looking around a lot I solved it by resetting the interfaces file to default:
auto lo
iface lo inet loopback
auto enp4s0
iface enp4s0 inet dhcp
Then rebooted, and Proxmox seemed to automatically reconfigure the ethernet.
I then made a Linux bridge to the device on proxmox
To view the ethernet connection via the Debian GUI I had to modify the /etc/NetworkManager/NetworkManager.conf file:
[ifupdown]
managed=true #changed to true
Then restart the network manager:
sudo systemctl restart NetworkManager
Now the system displays the wired connection.
After I installed Proxmox my ethernet did not appear to work on the machine (only wifi worked, which is what I used when installing Proxmox over Debian 12, not sure if that has any reason to do with why the ethernet configuration is broken). At first, the ethernet port didn't work (no lights on the port indicating a connection), but after I modified the interfaces config the lights on the port started working again, but there was still no ethernet single detected. Interestingly, I could still connect to the Proxmox server webUI or over SSH with the ethernet IP (innet). I disconnected from the wifi network to test if it was just prioritizing wifi, however, after doing so my wifi now does not work, it doesn't automatically find my wifi network anymore and now (missing wifi adapter in the Debian network GUI. Listed as down when entering "ip a" into terminal) I can't connect to the internet on the server machine. However, I can still ssh into the server via my ethernet connection ip. To troubleshoot I booted into my Windows installation on the machine, and the wifi works fine, but the ethernet is listed as unidentified network and no internet.
Fixed:
After looking around a lot I solved it by resetting the interfaces file to default:
auto lo
iface lo inet loopback
auto enp4s0
iface enp4s0 inet dhcp
Then rebooted, and Proxmox seemed to automatically reconfigure the ethernet.
I then made a Linux bridge to the device on proxmox
To view the ethernet connection via the Debian GUI I had to modify the /etc/NetworkManager/NetworkManager.conf file:
[ifupdown]
managed=true #changed to true
Then restart the network manager:
sudo systemctl restart NetworkManager
Now the system displays the wired connection.
Last edited:
