2
What firewall should I install for use with KDE Connect?
(sh.itjust.works)
Debian is a free operating system (OS) for your computer. An operating system is the set of basic programs and utilities that make your computer run. Debian provides more than a pure OS: it comes with over 59000 packages, precompiled software bundled up in a nice format for easy installation on your machine.
There is a firewalld GUI that is pretty standard on many distros. (Fedora, opensuse, redhat, etc... use it)