MyBB Community Forums

hello

what option is there to make it so user has to sign up to view all a thread

i want it like on hackforums.net

In Guest Group settings --> Forums & Posts tab --> Uncheck Can View Threads.

This will affect bots such as Google as well remember.

no no no friend

I want it so the user can see the links to threads, in home page and forum display, but when user clicks on it then must login to physically read it.

Any plugin or solution thanks

This isn't currently possible. And I don't know of any plugin that does this exactly to your specification. But you could use this: http://mybbsource.com/mods.php?act=view&id=38