SECURITY
An SPN is a required part of the Domino server's identity in the Active Directory domain and is formatted as follows:
HTTP/<DNS_name>@<Active_Directory_Kerberos_realm>
For example:
HTTP/www.renovations.com@AD.EAST.RENOVATIONS.COM
When you assign an SPN, you are telling the Windows Kerberos Key Distribution Center (KDC) that Kerberos service tickets can be issued to Domino. On behalf of the Web user, a Web browser client can then send a Kerberos service ticket to Domino which is used to authenticate the Web user.
You must assign an SPN for each DNS name found in a URL used to connect to a Domino server. The following steps demonstrate how an SPN is used during the process of authenticating a Web user in a Windows single sign-on environment:
1. A Web user enters a URL in a browser to connect to a Domino server participating in Windows single sign-on.
http://www.renovations.com/names.nsf
The DNS name is www.renovations.com
The Active Directory domain that the Domino server machine belongs to is AD.EAST.RENOVATIONS.COM
4. The Web browser receives the service ticket and sends it to the Domino server.
5. The Domino server accepts the service ticket and authenticates the user.
Steps to set up the Windows service for Domino server
1. Decide which Active Directory account to assign the SPNs to.
2. Assign the SPNs to the account. Optionally use the domspnego.cmd utility provided with Domino to help with this step.
3. Verify that the Domino server Windows service is logged on under the account.
Related topics