[FR] Support IPv6-only networks

[SoniEx2]

Checks

• I have checked existing OPL feature requests for duplicates and found none

Describe the FR

We would like to use OPL on our IPv6-only home network.

Describe the solution you'd like

We would like OPL to support the IPv6-only network.

Describe alternatives you've considered

We've considered using a Raspberry Pi or old router to allow OPL to use the IPv6-only network (to the extent possible), but it is an awkward solution.

Additional context

N/A