Kerberos Configuration for RSS feeds

When testing the default rss viewer on Moss, remember some key things. First, if you have anonoymous access turned on, the user will see the rss feed regardless whether coming in NTLM or Kerberos. For kerberos feeds to work correctly with anonoymous access turned off, the user must come in as kerberos and have permission to the feed. If the user does not have permission to the feed, they will receive "the user does not support authenicated feeds" which is also the same error a user will receive if they come into the SharePoint site using NTLM.

One of the big gotchas is that if you a behind a proxy server, you will need to modify the web.config file in order to fill in the proxy server name. Otherwise, the rss won't work becase the credentials are not being passed for the user.

Great links for setting up Kerberos:
http://blogs.msdn.com/martinkearn/archive/2007/04/23/configuring-kerberos-for-sharepoint-2007-part-1-base-configuration-for-sharepoint.aspx

http://blogs.msdn.com/martinkearn/archive/2007/04/27/configuring-kerberos-for-sharepoint-2007-part-2-excel-services-and-sql-analysis-services.aspx

http://technet.microsoft.com/en-us/library/cc263449.aspx