---
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title: Kerberos
collection: tableau
version: current
locale: en-gb
portal_url: https://docs.salesforce.com/tableau/current/en-gb/server-linux/kerberos.md
canonical_url: https://help.tableau.com/current/server-linux/en-gb/kerberos.htm
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description: Understand Kerberos, a three-way authentication protocol used with Tableau Server.
---
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# Kerberos

Kerberos is a three-way authentication protocol that relies on the use of a trusted third-party network service called the Key Distribution Center (KDC) to verify the identity of computers and provide for secure connections between the computers through the exchange of _tickets_. These tickets provide mutual authentication between computers or services, verifying that one has permission to access the other.

Tableau Server supports Kerberos authentication in an Active Directory Kerberos environment, with authentication to Tableau Server being handled by Kerberos.

**Notes**: 

- The Kerberos support in Tableau Server is for user authentication. It does not handle internal permissions and authorisation related to Tableau Server content, such as workbooks.
- Identity pools, which is a tool designed to complement and support additional user provisioning and authentication options you might need in your organisation, supports OpenID Connect (OIDC) authentication only. For more information, see [Provision and Authenticate Users Using Identity Pools](https://help.tableau.com/current/server-linux/en-gb/identity_pools.htm).

## How Kerberos works

When you configure Tableau Server for Kerberos in an Active Directory (AD) environment, the AD domain controller also serves as the Kerberos Key Distribution Center (KDC) and issues Ticket Granting Tickets to the other nodes in the domain. Users authenticated by the KDC do not have to authenticate further when connecting to Tableau Server.

The following is a diagram of the authentication workflow.

![A diagram illustrating the authentication process for a Tableau Server user.](/tableau/current/en-gb/server-linux/en-gb/Img/kerb_client_server.png)

<table><tbody><tr><td style="text-align: center;"><img src="https://help.tableau.com/current/server-linux/en-gb/Img/1ball.png" alt="A blue circle with a white number 1 in the centre."></td><td>User logs into their Active Directory domain.</td><td style="text-align: center;"><img src="https://help.tableau.com/current/server-linux/en-gb/Img/2ball_32x32.png" style="width: 32;height: 32;" alt="A blue circle with a white number 2 in the centre."></td><td>The Kerberos KDC authenticates the user and sends a Ticket Granting Ticket (TGT) to the user's computer.</td></tr><tr><td style="text-align: center;"><img src="https://help.tableau.com/current/server-linux/en-gb/Img/3ball.png" alt="A blue circle with a white number 3 in the centre."></td><td>The user connects to Tableau Server in <span class="mc-variable Variables.TabsProductDesktop variable">Tableau Desktop</span> or in a web browser.</td><td style="text-align: center;"><img src="https://help.tableau.com/current/server-linux/en-gb/Img/4ball.png" alt="A blue circle with a white number 4 in the centre."></td><td><p>Tableau Server authenticates the user.</p></td></tr></tbody></table>

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