How can I redirect all incoming permalinks to index page

Hi,

Since I have been researching this quite a while now without any success I was hoping to get an answer from any of you.

I have a wordpress blog set up and would would need the readers to be redirected to the main domain (www.domain.com) instead of being able to access sub pages (www.domain.com/permalink-of-sub-page) directly.

So whenever you try to upon a permalink you should always be taken to the index page instead.

Is that possible?
I’d really appreciate any help on this one!
Thanks,
Philipp