WAN & LAN default interface assignment

[NewMe]

Hello. I'm a noob with OPNSense. My background is not IT related, but am proficient in tech.

My setup is a mini PC hardware with one internal mainboard 1GB NIC (em0), and have added a 4-port PCI NIC (igb0-3). This is running OPNSense on bare-metal.

On initial installation, the default interface assignment is WAN->igb1 and LAN->igb0. I have tried different permutations and they all seem to work including em0.

What problem(s) exist if I use em0 for either WAN or LAN?

Thank you.

[Patrick M. Hausen]

None. Assign as you see fit. There has to be *some* default for a newly installed device, right?

[NewMe]

Thank you, Patrick.