What exactly doesn't work? If you configure the IP manually, does it show in 'ip a' output? Is the interface up? You need to share more details otherwise it's difficult to help, it would be mostly guessing. Zitat von A Monster <amonster369@gmail.com>:

I tried attaching that public interface directly to the instance, and use that same ip address to configure the port manually inside the instance, but it doesn't work.