Is there a short command for block all countries?

[Jaipharma]

I would like to block incoming from all countries then allow incoming only from my counties.
Is there a short command for this?

[dvershinin]

None as of yet.

This would require setting default zone to "drop" and adding another FirewallD zone for trusted countries which which has priority over drop, e.g. 000-trusted.

Pull requests are welcome as I don't have much time for now.