🛡️ Azure Application Gateway HTTP2 protocol is not enabled🟢

• Contextual name: 🛡️ Application Gateway HTTP2 protocol is not enabled🟢
• ID: /ce/ca/azure/application-gateway/gateway-http2-protocol
• Tags:
  • 🟢 Policy with categories
  • 🟢 Policy with type
  • 🟢 Production policy
• Policy Type: COMPLIANCE_POLICY
• Policy Categories: SECURITY

Logic

• 🧠 prod.logic.yaml🟢
  • 📗 Azure Application Gateway
  • 🔌 Azure Application Gateway - object.extracts.yaml
  • 🧪 test-data.json

Description

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Description

This policy identifies Azure Application Gateways that do not utilize HTTP/2. Consider enabling HTTP/2 for improved performance, efficiency, and security. HTTP/2 protocol support is available to clients that connect to application gateway listeners only. Communication with backend server pools is always HTTP/1.1.

Rationale

Enabling HTTP/2 supports use of modern encrypted connections.

Impact

Clients and backend services that do not support HTTP/2 will fall back to HTTP/1.1.

Audit

This policy flags an Azure Application Gateway as INCOMPLIANT if it HTTP/2 traffic is not Enabled.

Default Value

HTTP2 is enabled by default.

References

1. https://learn.microsoft.com/en-us/azure/application-gateway/features#websocket-and-http2-traffic
2. https://learn.microsoft.com/en-us/cli/azure/network/application-gateway
3. https://learn.microsoft.com/en-us/powershell/module/az.network/get-azapplicationgateway
4. https://learn.microsoft.com/en-us/powershell/module/az.network/set-azapplicationgateway

Remediation

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Remediation

From Azure Portal

1. Go to Application gateways.
2. Click the name of an application gateway.
3. Under Settings, click Configuration.
4. Under HTTP2, click Enabled.
5. Click Save.
6. Repeat steps 1-5 for each application gateway requiring remediation.

From Azure CLI

For each application gateway requiring remediation, run the following command to enable HTTP2:

az network application-gateway update --resource-group {{resource-group}} --name {{application-gateway}} --http2 Enabled

From PowerShell

Run the following command to get the application gateway in a resource group with a given name:

$gateway = Get-AzApplicationGateway -ResourceGroupName {{resource-group}} -Name {{application-gateway}}

Run the following command to enable HTTP2:

$gateway.EnableHttp2 = $true

Run the following command to apply the update:

Set-AzApplicationGateway -ApplicationGateway $gateway

Repeat for each application gateway requiring remediation.

policy.yaml

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Linked Framework Sections

Section	Sub Sections	Internal Rules	Policies	Flags	Compliance
💼 CIS Azure v5.0.0 → 💼 7.13 Ensure 'HTTP2' is set to 'Enabled' on Azure Application Gateway (Automated)			1		no data
💼 Cloudaware Framework → 💼 Threat Protection			48		no data