title: Kerberos Delegation for Clients Ouside the Firewall
body: <p>I am trying to run a SQL Server Reporting Services where the data for the report is on a SQL Server database that's on a different server.  Integrated Authentication is turned on for both the Report Server and the report.  I have confirmed that Kerberos delegation is working fine by using Internet Explorer to run the report from inside the network.  </p>
  
  <p>However, when I open the report server through the firewall, I cannot run the report.  I get the following error: An error has occurred during report processing.  Cannot create a connection to data source 'frattoxppro2'.  Login failed for user 'NT AUTHORITY\ANONYMOUS LOGON'. </p>
  
  <p>Does Kerberos authentication <em>not</em> work outside a firewall?</p>