Between UFW and firewalld which is more recommended for 
Plasma?
I am an Arch Linux user and I have to choose between the two, my choice is mainly based on which is the standard or which should be used with Plasma.
So here is my question — is there a standard? If so, which one?
UFW is standard on KDE Neon, and I’m guessing also on Kubuntu and other *Buntu based distros, such as Linux Mint. I don’t know whether it’s standard or not though in other distros.
AFAIK there’s no preference from the KDE side, hence why the page provides the option to use either.
Ubuntu-based distros tend to prefer UFW while openSUSE and Fedora use firewalld.
If you want a firewall that’s simple to use then go with UFW, if you have a more specialized use case (like custom firewall profiles/zones) then go with firewalld (though if you’re asking this question to begin with it probably means you should go with UFW 
).
