How can I redirect every request for any wordpress page?

How can I redirect every request for any wordpress page, whether the page exists or not?

I have an old buddypress site that get a lot of traffic and spam. So much spam relative to the sites actual value.

I might want to reactive the site someday and would like to be able to sort through it later. So I do not want to delete it.

I just want every request for the main site or any page on the site to be redirected to another related domain so I do not waste the visitor traffic.