block all by default - list exceptions

Hello
Is it possible to block all posts, and just list the few exceptions?
I only want to allow a few posts, all other should be protected, it would be much easier to just list the 5 posts that are allowed, instead of having to list or tag all the protected.
In other words, instead of the default being everything allowed and having to list what I want blocked, is it possible to do it in just the opposite way?
Is it possible to block all posts, and just list the few exceptions?
I only want to allow a few posts, all other should be protected, it would be much easier to just list the 5 posts that are allowed, instead of having to list or tag all the protected.
In other words, instead of the default being everything allowed and having to list what I want blocked, is it possible to do it in just the opposite way?