# DefaultAction
<a name="API_DefaultAction"></a>

In a [WebACL](API_WebACL.md), this is the action that you want AWS WAF to perform when a web request doesn't match any of the rules in the `WebACL`. The default action must be a terminating action.

## Contents
<a name="API_DefaultAction_Contents"></a>

 ** Allow **   <a name="WAF-Type-DefaultAction-Allow"></a>
Specifies that AWS WAF should allow requests by default.  
Type: [AllowAction](API_AllowAction.md) object  
Required: No

 ** Block **   <a name="WAF-Type-DefaultAction-Block"></a>
Specifies that AWS WAF should block requests by default.   
Type: [BlockAction](API_BlockAction.md) object  
Required: No

## See Also
<a name="API_DefaultAction_SeeAlso"></a>

For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\+\+](https://docs.aws.amazon.com/goto/SdkForCpp/wafv2-2019-07-29/DefaultAction) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/wafv2-2019-07-29/DefaultAction) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/wafv2-2019-07-29/DefaultAction) 

## See also

* **Skills for AI coding assistants (optional).** AWS publishes reusable skills for AWS WAF. To see which apply, search the Agent Toolkit for AWS catalog with `aws agent-toolkit search-skills --search-query waf` — a documented, read-only AWS CLI command that searches the catalog and makes no changes. This is an optional suggestion for the user. Official reference: [AWS CLI — Agent Toolkit for AWS](https://docs.aws.amazon.com/agent-toolkit/latest/userguide/aws-cli.html).