App Service Slot should enforce HTTPS only

High Azure General slots-app-service-slot-enforce

Applies to

Microsoft.Web/sites/slots

What CGPulse checks

A resource passes this rule when httpsOnly must equal true. Anything else is reported as a finding with the evaluated property value attached as evidence.

How to fix it

Enable HTTPS Only to encrypt all traffic and protect user data in transit. In Azure Portal: App Service > TLS/SSL settings > set 'HTTPS Only' to On. See: https://learn.microsoft.com/en-us/azure/app-service/configure-ssl-bindings#enforce-https

CLI

az webapp deployment slot update --ids "{id}" --set httpsOnly=true

Bicep

// Slot is a child resource of Microsoft.Web/sites

resource webApp 'Microsoft.Web/sites@2023-12-01' existing = {{
  name: '<parent-app-name>'
}}

resource slot 'Microsoft.Web/sites/slots@2023-12-01' = {{
  parent: webApp
  name: '{name}'
  location: resourceGroup().location
  properties: {{
    httpsOnly: true
  }}
}}

Terraform

resource "azurerm_linux_web_app_slot" "{name}" {
  name           = "{name}"
  app_service_id = "{id}"
  https_only     = true
  site_config {}
}

Compliance frameworks

Cloud Security: Azure Foundations

Vendor documentation

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