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Tableau Desktop Failed To Connect To Tableau Server When Tlsv1.2 Disabled


Published: 24 Apr 2021
Last Modified Date: 27 Apr 2021

Issue

After disabling TLSv1.2, Tableau Desktop fails to connect to Tableau Server with the following error message :

Unable to complete action
Cannot connect to Tableau Server. Please check the server name and port and try again. 
Error Code : 9F4C5638
Internet communication error: SSL connect error(servername)

Environment

  • Tableau Desktop 2020.4
  • Tableau Server 2020.4

Resolution

Check the current ssl.protocols by running tsm CLI on Tableau Server host machine : 
  • tsm configuration get -k ssl.protocols
If the output contains -TLSv1.2, it means TLSv1.2 is currently disabled.
In order to enable it, please run the following tsm CLI :

On Windows :
  • tsm configuration set -k ssl.protocols -v "all -SSLv2 -SSLv3 -TLSv1 -TLSv1.1"
  • tsm pending-changes apply

On Linux : 
  • tsm configuration set -k ssl.protocols -v 'all -SSLv2 -SSLv3 -TLSv1 -TLSv1.1'
  • tsm pending-changes apply

Cause

Tableau Desktop do not yet support TLS v1.3.
Disabling TLSv1.2 will prevent the secure connection from Tableau Desktop.
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