If you want to change your IP address without using a VPN in Windows 11/10, edit the IP address settings or use Command Prompt.

There are a couple of things you can do if you cannot change Static IP address & DNS server on Windows 11/10. Try these working fixes.

Sometimes you may need to give your Xbox a Static IP address to solve issues with NAT typing. Here's how you can set a Static IP address on your Xbox console using your home Wi-Fi or wired router.

Looks like it's not "5 static IP addresses on 5 devices behind DSL modem in Bridge Mode", but 5 addresses behind PPPoE. If so, you need only one PPPoE connection on one of the routers (1), also ...