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Here's a good post (here at SEOmoz) about the rel=canonical tag: http://www.seomoz.org/blog/complete-guide-to-rel-canonical-how-to-and-why-not Here is a good resource for 301 redirects in other languages: http://www.webconfs.com/how-to-redirect-a-webpage.php I don't have much experience with .NET but it looks like there are two ways to accomplish it. 1) Make changes to IIS to create the permanent redirect, 2) create server side code (maybe you have to check what URL is being requested and redirect them to the correct format?). You should be able to use REGEX like is displayed in my original post to accomplish this in .NET. I would say the change directly in IIS, if you have access, is the way to go. Jared