Ensure the web app has ' Client Certificates (Incoming client certificates) ' set to ' On '
Description
Client certificates allow for the app to request a certificate for incoming requests. Only clients that have a valid certificate will be able to reach the app.
Remediation
Perform the following in the Azure Console:
Login to Azure Portal using https://portal.azure.com
Go to App Services
Click on each App
Under Setting section, Click on SSL settings
Set Incoming client certificates to On under Protocol Settings section
Perform the following in Azure Command Line Interface 2.0:
To set Incoming client certificates value for an existing app, run the following command.
az webapp update –resource-group <RESOURCE_GROUP_NAME> –name <APP_NAME> –set clientCertEnabled=true