---
schema_version: "1"
id: df6f6013794c41b0bfed53d50bd3c485f79473d93fee000a23e38ab1c94734ef
title: SSL
collection: tableau
version: current
locale: en-gb
portal_url: https://docs.salesforce.com/tableau/current/en-gb/server-linux/ssl.md
canonical_url: https://help.tableau.com/current/server-linux/en-gb/ssl.htm
source_site: help.tableau.com
content_type: documentation
content_hash: ec80daad2c3b913e3503dc192330821fce85cade5cf3f71120017eecdfa11df0
description: Overview of using SSL to encrypt communication with Tableau Server.
---
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# SSL

SSL (Secure Sockets Layer) is a standard security technology that establishes an encrypted link between a web server and clients. To use SSL, you need to install an SSL certificate on Tableau Server.

**Important:** Beginning with version 2025.2 (Tableau Desktop), 2025.3 (Tableau Server) and June 2025 (Tableau Cloud), Tableau uses OpenSSL 3.4.x and Level-2 security. Level-2 security requires keys of 2,048 bits or longer. Any existing Level-1 security keys will no longer work, and you will need to generate and deploy a new key pair. If you have been generating at least 2,048-bit length keys as recommended, no action is necessary. For more information see [Generate a key](https://help.tableau.com/current/server-linux/en-gb/ssl_cert_create.htm#generate-key).

You can configure Tableau Server to use SSL in the following ways:

- Use SSL for external HTTP traffic.
- Use mutual (two-way) SSL between clients (Tableau Desktop, web browsers, and tabcmd.exe) and Tableau Server.
- Use SSL for all HTTP traffic between internal server components and the repository.

If you are using mutual SSL, each client also needs a certificate.

**Note:** Tableau Server uses SSL for user authentication. SSL is not used to handle permissions and authorisation to content (data sources and workbooks) hosted on Tableau Server.

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