SPN

SPN

Service Principal Name.

Service Principal Name is the name by which a client uniquely identifies an instance of a service. A given service can have multiple SPNs if there are different names which clients might use.

Each SPN consists of:

• a class name
  this identifies the general class of the service, for example "SqlServer" or "www" etc.
• a hostname
  which identifies the computer on which the service is running
• a port (optional)
• a service name (optional)
  used to identify the specific data or feature required where the service provides multiple features.

For more information see:

• http://msdn.microsoft.com/en-us/library/ms677949%28VS.85%29.aspx - Service Principal Names, an article from Microsoft.
• http://msdn.microsoft.com/en-us/library/ms677601%28v=VS.85%29.aspx - Name formats for Unique SPNs.