This is the new *Amazon CloudFormation Template Reference Guide*. Please update your bookmarks and links. For help getting started with CloudFormation, see the [Amazon CloudFormation User Guide](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/Welcome.html).

# AWS::WAFRegional::IPSet IPSetDescriptor
<a name="aws-properties-wafregional-ipset-ipsetdescriptor"></a>

**Note**  
Amazon WAF Classic support will end on September 30, 2025.   
This is **Amazon WAF Classic** documentation. For more information, see [Amazon WAF Classic](https://docs.amazonaws.cn/waf/latest/developerguide/classic-waf-chapter.html) in the developer guide.  
**For the latest version of Amazon WAF**, use the Amazon WAFV2 API and see the [Amazon WAF Developer Guide](https://docs.amazonaws.cn/waf/latest/developerguide/waf-chapter.html). With the latest version, Amazon WAF has a single set of endpoints for regional and global use. 

Specifies the IP address type (`IPV4` or `IPV6`) and the IP address range (in CIDR format) that web requests originate from.

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

### JSON
<a name="aws-properties-wafregional-ipset-ipsetdescriptor-syntax.json"></a>

```
{
  "[Type](#cfn-wafregional-ipset-ipsetdescriptor-type)" : String,
  "[Value](#cfn-wafregional-ipset-ipsetdescriptor-value)" : String
}
```

### YAML
<a name="aws-properties-wafregional-ipset-ipsetdescriptor-syntax.yaml"></a>

```
  [Type](#cfn-wafregional-ipset-ipsetdescriptor-type): String
  [Value](#cfn-wafregional-ipset-ipsetdescriptor-value): String
```

## Properties
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`Type`  <a name="cfn-wafregional-ipset-ipsetdescriptor-type"></a>
Specify `IPV4` or `IPV6`.  
*Required*: Yes  
*Type*: String  
*Allowed values*: `IPV4 | IPV6`  
*Update requires*: [No interruption](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`Value`  <a name="cfn-wafregional-ipset-ipsetdescriptor-value"></a>
Specify an IPv4 address by using CIDR notation. For example:  
+ To configure Amazon WAF to allow, block, or count requests that originated from the IP address 192.0.2.44, specify `192.0.2.44/32`.
+ To configure Amazon WAF to allow, block, or count requests that originated from IP addresses from 192.0.2.0 to 192.0.2.255, specify `192.0.2.0/24`.
For more information about CIDR notation, see the Wikipedia entry [Classless Inter-Domain Routing](https://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing).  
Specify an IPv6 address by using CIDR notation. For example:  
+ To configure Amazon WAF to allow, block, or count requests that originated from the IP address 1111:0000:0000:0000:0000:0000:0000:0111, specify `1111:0000:0000:0000:0000:0000:0000:0111/128`.
+ To configure Amazon WAF to allow, block, or count requests that originated from IP addresses 1111:0000:0000:0000:0000:0000:0000:0000 to 1111:0000:0000:0000:ffff:ffff:ffff:ffff, specify `1111:0000:0000:0000:0000:0000:0000:0000/64`.
*Required*: Yes  
*Type*: String  
*Pattern*: `.*\S.*`  
*Minimum*: `1`  
*Maximum*: `50`  
*Update requires*: [No interruption](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)