Thank you for using our services.
When you add Forums controls to your pages you can set the LoginPageUrl through the control designer. Thus when a not logged in user reaches the forums and want to post/view the forums they will be redirected to the a previously set login page (see attached image). You will have to create a page that will have Login controls and point to that page.
Then if you go to Modules -> Forums
and go to the Permissions
you will be able to set permissions for different roles. If you set for example Allow Delete
permission to a certain role of user, all users that belong to this role will be able to delete, replies and threads. If you give them Modify
permissions they will be able to edit forum posts and replies.
the Telerik team