在设置general setting 分三种,选择板块限制,就可以只有白名单用户才可以发帖,但是任何人都可以评论.

Post approval - only approved users can post, but everyone can comment

Comment approval - only approved users can comment, but everyone can post

Post & Comment approval - only approved users can post and comment (similar to private subs, but everyone can see it even if they can't interact)