Need Help With WWW vs. Non-WWW Duplicate Pages

[BrittanyHighland]

A friend I'm working with at RedChairMarket.com is having duplicate page issues. Among them, both www and non-www URLs are being generated automatically by his software framework, ASP.net mvc 3.

How should we go about finding and tackling these duplicates?

Thanks!

[mosquitohawk]

Hello!

Is it just you have both www and non-www versions of all pages that are resolving?  If so you can add one 301 redirect rule in IIS to redirect all of them from one to the other and solve the problem.  If not, feel free to provide more detail and I or someone else can chime in.

EDIT
I just took a quick look and it looks like that's part of the problem. Follow the above and it should take care of it.  I also noted the non-SSL version is 302 redirecting to the SSL version.  That is an incorrect implementation.  You want that to be a 301 so if someone links to the non-SSL version you get credit for that link juice.

Cheers!