Kerberos Key Distribution Center (System Services for the Windows Server 2003 Family and Windows XP Operating Systems)
Applies To: Windows Server 2003, Windows Server 2003 R2, Windows Server 2003 with SP1, Windows Server 2003 with SP2
Service Name: Kdc
Executable Name: lsass.exe
Log On As: LocalSystem
Description: Enables users to log on to the network using the Kerberos v5 authentication protocol.
As in other implementations of the Kerberos protocol, the KDC is a single process that provides two services:
This service issues ticket granting tickets (TGTs) for connection to the ticket-granting service in its own domain or in any trusted domain. Before a client can ask for a ticket to another computer, it must request a TGT from the authentication service in the clients account domain. The authentication service returns a TGT for the ticket granting service in the target computers domain. The TGT can be reused until it expires, but first access to any domains ticket-granting service always requires a trip to the authentication service in the clients account domain.
Ticket-Granting Service (TGS)
This service issues tickets for connection to computers in its own domain. When clients want access to a computer, it must request a TGT, and ask for a ticket to the computer. The ticket can be reused until it expires, but first access to any computer always requires a trip to the ticket-granting service in the target computers account domain.
If this service is stopped, users will be unable to log on to the domain and access services.
Available on: Windows Server 2003, Standard Edition; Windows Server 2003, Enterprise Edition; Windows Server 2003, Datacenter Edition and Windows Server 2003, Web Edition.
Installed through: Default operating system installation
Startup type: Disabled
Service status: Stopped
This service depends on the following system components:
Remote Procedure Call
AFD Networking Support Environment
The following system components depend on this service: None
IP Port Numbers used:
TCP: 88, 544
UDP: 88, 464