# `AWSConfigRemediation-DisableSubnetAutoAssignPublicIP`
<a name="automation-aws-disable-subnet-auto-public-ip"></a>

 **Description** 

 The `AWSConfigRemediation-DisableSubnetAutoAssignPublicIP` runbook disables the IPv4 public addressing attribute for the subnet you specify. 

 [Run this Automation (console)](https://console.aws.amazon.com/systems-manager/automation/execute/AWSConfigRemediation-DisableSubnetAutoAssignPublicIP) 

**Document type**

Automation

**Owner**

Amazon

**Platforms**

Linux, macOS, Windows

**Parameters**
+ AutomationAssumeRole

  Type: String

  Description: (Required) The Amazon Resource Name (ARN) of the AWS Identity and Access Management (IAM) role that allows Systems Manager Automation to perform the actions on your behalf.
+ SubnetId

  Type: String

  Description: (Required) The ID of the subnet that you want to disable the auto-assign public IPv4 address attribute on.

**Required IAM permissions**

The `AutomationAssumeRole` parameter requires the following actions to use the runbook successfully.
+  `ssm:StartAutomationExecution` 
+  `ssm:GetAutomationExecution` 
+  `ec2:DescribeSubnets` 
+  `ec2:ModifySubnetAttribute` 

 **Document Steps** 
+  `aws:executeAwsApi` - Disables the auto-assign public IPv4 address attribute for the subnet you specified in the `SubnetId` parameter. 
+  `aws:assertAwsResourceProperty` - Verifies the attribute has been disabled.