admin panel, permissions tab
on the left side: group forum permissions
choose guest group
choose all of your forums that want and select "read only" access in the drop down.
if you have a lot of forums, it may choke, do five or so forums at once until you get them all set.
I am available for custom work on a donation basis. Please send me a PM with your needs.
Premium phpBB 3.2 Styles
OK, so what's the speed of dark?