Board Thread:Support Requests - Community Management/@comment-25657959-20200922211742/@comment-45117243-20200922212519

I don't think protecting a whole namespace is possible, nor allowed by Fandom terms of use.

Blocking unregistered users is possible through the admin dashboard - "require all editors to log in" or something like that.

Edit: I just realized - you want to prevent unregistered users only from creating new pages, not from editing? I'm not sure, but maybe abuse filters can do that. I'm not familiar with it but I guess you have to request it from Fandom staff with a reasonable reason.