How to force the use of TLS 1.3 in the App Service(Azure)?

Question

Answer 1

Hi,

You can't set it via the portal (not yet, coming soon), but you can using powershell commands in Azure Cloud Shell, see sample below:

$webapp = Get-AzWebApp -Name myWebApp -ResourceGroupName myResourceGroup                                            
$webapp.SiteConfig.minTlsVersion = 1.3                                                                      
$webapp|Set-AzWebApp

After making the change you may verify minimum TLS using below:

https://www.ssllabs.com/ssltest/analyze.html

Once the test is complete, scroll down to Configuration section of the results, and confirm that TLS 1.3 = Yes and TLS 1.2 = No, indicating that TLS 1.3 is minimum required, as shown below:

Please click Accept Answer and upvote if the above was helpful.

Thanks.

-TP