Application Gateways use a minimum TLS 1.2

Security · Application Gateway · 2020_06

Application Gateway should only accept a minimum of TLS 1.2.

Description

Application Gateway should only accept a minimum of TLS 1.2 to ensure secure connections.

Recommendation

Consider configuring Application Gateway to accept a minimum of TLS 1.2.

Configure with Azure template

To deploy Application Gateways that pass this rule:

• Set the properties.sslPolicy.minProtocolVersion property to TLSv1_2.

For example:

Azure Template snippet

{
    "type": "Microsoft.Network/applicationGateways",
    "apiVersion": "2020-11-01",
    "name": "appGw-001",
    "location": "[resourceGroup().location]",
    "properties": {
        "sku": {
            "name": "WAF_v2",
            "tier": "WAF_v2"
        },
        "sslPolicy": {
          "minProtocolVersion": "TLSv1_2"
        }
    }
}

Configure with Bicep

To deploy Application Gateways that pass this rule:

• Set the properties.sslPolicy.minProtocolVersion property to TLSv1_2.

For example:

Azure Bicep snippet

resource name_resource 'Microsoft.Network/applicationGateways@2019-09-01' = {
  name: 'appGw-001'
  location: location
  properties: {
    sku: {
      name: 'WAF_v2'
      tier: 'WAF_v2'
    }
    sslPolicy: {
      minProtocolVersion: 'TLSv1_2'
    }
  }
}

Links

• Data encryption in Azure
• Application Gateway SSL policy overview
• Configure SSL policy versions and cipher suites on Application Gateway
• Overview of TLS termination and end to end TLS with Application Gateway
• Azure deployment reference

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Last update: 2022-10-17

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