--On Tuesday, July 12, 2016 11:20 AM -0700 Jeff White <jeff.white at wsu.edu> wrote: > how do you tell firewalld to stop forwarding traffic between interfaces? (Caveat: I'm a firewalld virgin so know only what I've read.) I believe firewalld works in terms of "zones", not interfaces. An interface belongs to a zone. So you need to create new zones that contain each interface you want to isolate, based on the default zone properties. You can then issue rules based on those zones.