Change Proxmox IP address

Do you want to change the Proxmox IP address thoroughly? This article will explain the impact on Proxmox when changing its IP address.

Change IP address (GUI)

To change the IP address for Proxmox you have to log in to Proxmox, select your node, and navigate to Network. Here you select your network adapter and click Edit. Now modify its IP address and click Ok.

To apply the changes reboot the system. Take note that it will only change the IP address on the login screen and other files are not changed, keep on reading if you want to change those too.

Change IP address (console)

To view what files contain Proxmox’s IP address enter the following command:

grep -rnw '/' -e '<Current Proxmox IP address>'

If the output becomes too long you can scope the search (to /etc since this folder contains most of the configurations) or pipe (|) it to a file.

The following files should pop up and are important to change:

• /etc/networ/interfaces: Change here to change the actual IP address of Proxmox
• /etc/hosts: Change here to update the DNS record
• /etc/issue: Change here to change the header screen when Proxmox is booted
  
• /etc/pve/priv/known_hosts: Change here to update the known_hosts for SSH connections

Sources

• How can I find all files containing specific text (string) on Linux? (stackoverflow.com)
• The IP address in console (for browser) is incorrect (forum.proxmox.com)