I don't use Blender myself, but it is installed in our teaching labs. I'm the system administrator for these labs, and I'm trying to configure the computers so that one of our students can use them in a render farm configuration for a special event. Specifically, I need to know how Windows Firewall should be configured.
In the old manual for Blender 2.6 I found a page titled Networks in Blender rendering. This seems to imply (but does not state outright) that only the machine running the Master server needs the firewall configured, that it requires only a single port to be opened, and that you can choose whatever port you like. (There is no mention there of a default port, though I found some other posts suggesting that 8000 may be the usual choice.)
I couldn't find an equivalent page in the current manual. If it makes any difference, we are running Blender 2.77a.
Will it be sufficient for me to open a single port, say 8000, and advise the student to use that? Or is it more complicated than that?