which command do you use to configure an spn for a user account? course hero

by Joaquin Prosacco 9 min read

How to configure service principal names (SPN)?

Nov 02, 2021 · All you need to do is to provide permissions for the Network Controller machines to register and modify the SPN. On the Domain Controller machine, start Active Directory Users and Computers. Select View > Advanced. Under Computers, locate one of the Network Controller machine accounts, and then right-click and select Properties.

How do I configure the SPN of the network controller?

You can check the existing set of SPNs for the machine account by running the following command: > Setspn.exe -L < myIISserver-NetBIOS-name > SCENARIO 2b SPNs will be required ONLY for the IIS machine account and NOT for Domain1\Username1 account unlike in IIS 6.0. HTTP/ for e.g. HTTP/ www.mysite.com

How to find out which SPN is used for which users?

May 04, 2012 · 1. Yes, it's normal, after a computer is promoted to be a domain controller, it will be located to Domain Controllers OU instead of Computers container. 2. You should use setspn -a domain\username command to register the service SPN for the user account, like: setspn -a http/webserver.domain.com domain\username.

How do I use setspn to manage SPN registrations?

setspn -L Or setspn to find SPNs linked to a certain user account: setspn -L And now you need a general script to list all SPNs, for all users and all computers… Use -SearchBase with Get-ADComputer for faster results Retrieve SSH public key from Active Directory for SSH authentication

What is SPN in Kerberos?

The SPN is a unique identifier for the Network Controller service instance, which is used by Kerberos authentication to associate a service instance with a service login account. For more details, see Service Principal Names.

What happens if SPN is not registered?

If SPN is not registered, REST client authentication uses NTLM, which is less secure. You also get a critical event in the Admin channel of NetworkController-Framework event channel asking you to provide permissions to the Network Controller nodes to register SPN.

What authentication method does a network controller use?

You can use Kerberos based authentication, X509 certificate-based authentication. You also have the option to use no authentication for test deployments.

Can you use an IP address for Kerberos?

Typically, you can configure Network Controller to use an IP address or DNS name for REST-based operations. However, when you configure Kerberos, you cannot use an IP address for REST queries to Network Controller.

What is SPN in TCP?

User-specified SPNs are supported in client drivers. However, if an SPN isn't provided, it will be generated automatically based on the type of a client connection. For a TCP connection, an SPN in the format MSSQLSvc / FQDN : [ port] is used for both the named and default instances.

How to use Kerberos authentication in SQL Server?

To use Kerberos authentication with SQL Server requires both the following conditions to be true: 1 The client and server computers must be part of the same Windows domain, or in trusted domains. 2 A Service Principal Name (SPN) must be registered with Active Directory, which assumes the role of the Key Distribution Center in a Windows domain. The SPN, after it's registered, maps to the Windows account that started the SQL Server instance service. If the SPN registration hasn't been performed or fails, the Windows security layer can't determine the account associated with the SPN, and Kerberos authentication isn't used.#N#Note#N#If the server can't automatically register the SPN, the SPN must be registered manually. See Manual SPN Registration.

What does SQL Server Native Client do?

When an application opens a connection and uses Windows Authentication, SQL Server Native Client passes the SQL Server computer name, instance name and, optionally, an SPN. If the connection passes an SPN, it's used without any changes.

Question

I run dcpromo and promote my computer as domain controler in new forest and new domain.

Answers

1-first when I go to active directory users and computers I don't see under computer tab any computer name (of my domain conroller). is this normal when you have only one domain controller installed without clients or other servers?

All replies

1-first when I go to active directory users and computers I don't see under computer tab any computer name (of my domain conroller). is this normal when you have only one domain controller installed without clients or other servers?

How to see SPNs in Active Directory?

To be able to see the SPNs using Active Directory Users and Computers, you need to have Advanced Features enabled in the console by going to the View menu. After enabling it, go to the desired AD object, choose Properties and go to the Attribute Editor tab:

What is an SPN in AD?

First of all, an SPN is like an alias for an AD object, which can be a Service Account, User Account or Computer object, that lets other AD resources know which services are running under which accounts and creates associations between them in Active Directory. There are several ways to check which SPNs are assigned to an object.

The Role of The Spn in Authentication

Permissions

Spn Formats

  • Beginning with SQL Server 2008, the SPN format is changed in order to support Kerberos authentication on TCP/IP, named pipes, and shared memory. The supported SPN formats for named and default instances are as follows. Named instance 1. MSSQLSvc/<FQDN>:[<port> | <instancename>], where: 1.1. MSSQLSvcis the service that is being registered. 1.2. <FQDN>is th…
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Automatic Spn Registration

  • When an instance of the SQL Server Database Engine starts, SQL Server tries to register the SPN for the SQL Server service. When the instance is stopped, SQL Server tries to unregister the SPN. For a TCP/IP connection, the SPN is registered in the format MSSQLSvc/<FQDN>:<tcpport>.Both named instances and the default instance are registered as MSSQLSvc, relying on the <tcpport>…
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Manual Spn Registration

  • To register the SPN manually, you can use Setspn tool that is built into Windows. Setspn.exe is a command-line tool that enables you to read, modify, and delete the Service Principal Names (SPN) directory property. This tool also enables you to view the current SPNs, reset the account's default SPNs, and add or delete supplemental SPNs. For more in...
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Client Connections

  • User-specified SPNs are supported in client drivers. However, if an SPN isn't provided, it will be generated automatically based on the type of a client connection. For a TCP connection, an SPN in the format MSSQLSvc/FQDN:[port] is used for both the named and default instances. For named pipes and shared memory connections, an SPN in the format MSSQLSvc/<FQDN>:<insta…
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Authentication Defaults

  • The following table describes the authentication defaults that are used based on SPN registration scenarios.
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Comments

  • The Dedicated Administrator Connection (DAC) uses an instance name-based SPN. Kerberos authentication can be used with a DAC if that SPN is registered successfully. As an alternative a user can specify the account name as an SPN. If SPN registration fails during startup, this failure is recorded in the SQL Server error log, and startup continues. If SPN de-registration fails during …
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See Also