[LAD] [OT] F7 security

Somehat off-topic, but at least it's about systems to be used for audio exclusively... Help ! I'm struggling to get 5 computers running F7 configured. In the Gnome destop there's the app that lets you configure the firewall and selinux. It asks for the root password so I assume that when that's given I can do what I like. But everything I modify there (adding allowed ports for some networked audio apps) is silently ignored. Same if I try to disable the firewall. I must be ignoring something very simple... -- FA Laboratorio di Acustica ed Elettroacustica Parma, Italia Lascia la spina, cogli la rosa.