# `AWSConfigRemediation-DropInvalidHeadersForALB`
<a name="automation-aws-drop-alb-headers"></a>

 **Description** 

 The `AWSConfigRemediation-DropInvalidHeadersForALB` runbook enables the application load balancer you specify to remove HTTP headers with invalid headers. 

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

**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.
+ LoadBalancerArn

  Type: String

  Description: (Required) The Amazon Resource Name (ARN) of the load balancer that you want to drop invalid headers.

**Required IAM permissions**

The `AutomationAssumeRole` parameter requires the following actions to use the runbook successfully.
+  `ssm:StartAutomationExecution` 
+  `ssm:GetAutomationExecution` 
+  `elasticloadbalancing:DescribeLoadBalancerAttributes` 
+  `elasticloadbalancing:ModifyLoadBalancerAttributes` 

 **Document Steps** 
+  `aws:executeAwsApi` - Enables the drop invalid headers setting for the load balancer you specify in the `LoadBalancerArn` parameter. 
+  `aws:executeScript` - Verifies the drop invalid headers setting has been enabled on the load balancer you specify in the `LoadBalancerArn` parameter.