Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
I think you can redirect ALL traffic, but I'm not aware of a way to do it with one particular website. I've had a Linksys router for years and I don't remember ever seeing this setting.
 
I believe you'd have change your DNS hosts to a provider such as OpenDNS, create an account, login and setup a redirection using their system. I'm no networking expert but I believe those are the basic steps.

If it's just to block a website there are way easier ways to do so, but you'd have to provide a clearer idea of what it is that you actually want to do.
 
301 redirects are very easy to setup if you have access to the location the site is served from. If not, I'd be interested in why you want to redirect other people's websites to somewhere else. Doesn't sound like this would be used for legitimate purposes.
 
to be honest, its really more for practical joke type reasons :D and I was wondering if there were any simple solutions. if not, no biggie
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.