<note> <p>This is <b>AWS WAF Classic</b> documentation. For more information, see <a href="https://docs.aws.amazon.com/waf/latest/developerguide/classic-waf-chapter.html">AWS WAF Classic</a> in the developer guide.</p> <p> <b>For the latest version of AWS WAF</b>, use the AWS WAFV2 API and see the <a href="https://docs.aws.amazon.com/waf/latest/developerguide/waf-chapter.html">AWS WAF Developer Guide</a>. With the latest version, AWS WAF has a single set of endpoints for regional and global use. </p> </note> <p>Creates a <code>WebACL</code>, which contains the <code>Rules</code> that identify the CloudFront web requests that you want to allow, block, or count. AWS WAF evaluates <code>Rules</code> in order based on the value of <code>Priority</code> for each <code>Rule</code>.</p> <p>You also specify a default action, either <code>ALLOW</code> or <code>BLOCK</code>. If a web request doesn't match any of the <code>Rules</code> in a <code>WebACL</code>, AWS WAF responds to the request with the default action. </p> <p>To create and configure a <code>WebACL</code>, perform the following steps:</p> <ol> <li> <p>Create and update the <code>ByteMatchSet</code> objects and other predicates that you want to include in <code>Rules</code>. For more information, see <a>CreateByteMatchSet</a>, <a>UpdateByteMatchSet</a>, <a>CreateIPSet</a>, <a>UpdateIPSet</a>, <a>CreateSqlInjectionMatchSet</a>, and <a>UpdateSqlInjectionMatchSet</a>.</p> </li> <li> <p>Create and update the <code>Rules</code> that you want to include in the <code>WebACL</code>. For more information, see <a>CreateRule</a> and <a>UpdateRule</a>.</p> </li> <li> <p>Use <a>GetChangeToken</a> to get the change token that you provide in the <code>ChangeToken</code> parameter of a <code>CreateWebACL</code> request.</p> </li> <li> <p>Submit a <code>CreateWebACL</code> request.</p> </li> <li> <p>Use <code>GetChangeToken</code> to get the change token that you provide in the <code>ChangeToken</code> parameter of an <a>UpdateWebACL</a> request.</p> </li> <li> <p>Submit an <a>UpdateWebACL</a> request to specify the <code>Rules</code> that you want to include in the <code>WebACL</code>, to specify the default action, and to associate the <code>WebACL</code> with a CloudFront distribution.</p> </li> </ol> <p>For more information about how to use the AWS WAF API, see the <a href="https://docs.aws.amazon.com/waf/latest/developerguide/">AWS WAF Developer Guide</a>.</p>

{
  "success": true,
  "data": {
    "id": "abc123",
    "created_at": "2025-01-01T00:00:00Z"
  }
}

{
  "success": false,
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid request parameters"
  }
}