I use NordVPN and wanted to set it up network-wide using my TP Link ER605 V2 router. It claims IKEv2 support, but seems to require a pre-shared key (Which Nord doesn't offer) instead of an option for just a username/password for authentication.
Is there any other way to set it up using IKEv2, even if using custom firmware? If not, any suggestions for a simple router or device that could be used as an IKEv2 client with just a username/password to authenticate? Doesn't need wifi etc, just a bare bones VPN device to sit in the middle between my modem and main switch.
I know the ER605 supports OpenVPN, but I've tried that and it absolutely tanks our speed. So I'd prefer to stick to IKEv2 even if it means buying a new device.