How to hide the forums from the guests but still viewable to them if they know url

[mobilescafe.com]

Hi, Can any one help me with this? The thing i want to do is to hide my some forums from the guests but if they are following a url from another site they should be able to view the thread in that forum which is hidden.

From hiding i mean not shown on forumhome to them.

[KURTZ]

just check the permissions for the guests usergroup ... also check the permissions by forums ... you can do all these things into your ACP ... ;)