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# AWS::WAFv2::RuleGroup CustomHTTPHeader
<a name="aws-properties-wafv2-rulegroup-customhttpheader"></a>

A custom header for custom request and response handling. This is used in `CustomResponse` and `CustomRequestHandling`

## Syntax
<a name="aws-properties-wafv2-rulegroup-customhttpheader-syntax"></a>

To declare this entity in your CloudFormation template, use the following syntax:

### JSON
<a name="aws-properties-wafv2-rulegroup-customhttpheader-syntax.json"></a>

```
{
  "[Name](#cfn-wafv2-rulegroup-customhttpheader-name)" : String,
  "[Value](#cfn-wafv2-rulegroup-customhttpheader-value)" : String
}
```

### YAML
<a name="aws-properties-wafv2-rulegroup-customhttpheader-syntax.yaml"></a>

```
  [Name](#cfn-wafv2-rulegroup-customhttpheader-name): String
  [Value](#cfn-wafv2-rulegroup-customhttpheader-value): String
```

## Properties
<a name="aws-properties-wafv2-rulegroup-customhttpheader-properties"></a>

`Name`  <a name="cfn-wafv2-rulegroup-customhttpheader-name"></a>
The name of the custom header.   
For custom request header insertion, when AWS WAF inserts the header into the request, it prefixes this name `x-amzn-waf-`, to avoid confusion with the headers that are already in the request. For example, for the header name `sample`, AWS WAF inserts the header `x-amzn-waf-sample`.  
*Required*: Yes  
*Type*: String  
*Minimum*: `1`  
*Maximum*: `64`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`Value`  <a name="cfn-wafv2-rulegroup-customhttpheader-value"></a>
The value of the custom header.  
*Required*: Yes  
*Type*: String  
*Minimum*: `1`  
*Maximum*: `255`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)