Imported Config on New Device Freezing when Put in Production

[Sam of Ham]

I've just (finally!) upgraded to a Protectli VP2420. Going from x2 Realtek GbE NICs to x4 2.5GbE Intel I2116 NICs - very keen!

I'm having two partly inter-connected issues. I've taken my old image out and plugged it into the Protectli box, but found it froze up whenever I tried to edit the interfaces, or on boot - so gave up and did a fresh installation instead with a config import. However, every time I put the device into it's live environment (should just be port 1 WAN, port 2 LAN for now) it freezes. It might boot up but freeze at the console login window, or freeze before the login prompt is shown - I've even had it freeze as it makes the boot up beep sound, getting stuck on one constant tone!

Additionally, I'm noticing in the WAN config the warning "No WAN rules are currently defined. All incoming connections on the interface will be blocked" is now showing. I haven't changed anything from my previous config here, although I understand it may technically be a new interface as far as the system is concerned (rather than the old interface + config with a switched device) but because I didn't do a ton of config previously on WAN, I'm not sure what I need to do to get it back to 'normal.' Should I just start from a fresh config? The device freezing when I put in it's actual production environment is worrying; I can't tell if it's just some bug in the old ruleset that's freezing the unit, or if there's a hardware issue and the port or system is being overloaded.

Thanks in advance for your help all!