Views, how to link image ad to website

I want to create a block of ads in a grid format. I figured using views will help me in this area. However when I add the image in views it only links to the original content, and of course if your logged out you'll just get an unauthorized page text. How do i get the image to link to the ad's website using views?

By the way, I know I can use css to solve this problem, but I would like to use views as an option so I can display other content with the ad.

Thanks