Weird enough, I just realized that at the old subdomain (as a CNAME) logging in is still possible...
Default this is not set to anything, so this doesn't need to be set... afaik
Is there any way to make people login first before they can read posts or download files on my website ?
Yes, in ACP -> Manage -> Categories you can set privilege restrictions, so guests may not view topics and posts from whatever private categories you set
Oooh Thank youuu