My b2evolution Version: 2.x

Hai all there.. Happy new year.

I enabled the registration,login,and logout links on my template. all works well.

however when i signout, i can still comment on the posts, which i dont want.
I want each and every user to sign in/login if she or he is to comment on my posts/admin posts. a user must be denied to comment on posts unless when she is signed in.

how to do that?

any copy paste code??????????

iam not good in php, but i have alot of users on my site.

tq for yo reply in advance.