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Create a custom rule in the dashboard


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Create a custom rule in the dashboard


Last updated Apr 17, 2026|Copy as Markdown|View as Markdown|Agent setup

OverviewConfigure a custom response for blocked requests











In the Cloudflare dashboard, go to the Security rules page.
Go to Security rules ↗


To create a new empty rule, select Create rule > Custom rules. To duplicate an existing rule, select the three dots next to it > Duplicate.



Enter a descriptive name for the rule in Rule name.



Under When incoming requests match, use the Field drop-down list to choose an HTTP property. For each request, the value of the property you choose for Field is compared to the value you specify for Value using the operator selected in Operator.



Under Then take action, select the rule action in the Choose action dropdown. For example, selecting Block tells Cloudflare to refuse requests that match the conditions you specified.



(Optional) If you selected the Block action, you can configure a custom response.



To save and deploy your rule, select Deploy. If you are not ready to deploy your rule, select Save as Draft.







Log in to the Cloudflare dashboard ↗, and select your account and domain.



Go to Security > WAF > Custom rules.



To create a new empty rule, select Create rule. To duplicate an existing rule, select the three dots next to it > Duplicate.



Enter a descriptive name for the rule in Rule name.



Under When incoming requests match, use the Field drop-down list to choose an HTTP property. For each request, the value of the property you choose for Field is compared to the value you specify for Value using the operator selected in Operator.



Under Then take action, select the rule action in the Choose action dropdown. For example, selecting Block tells Cloudflare to refuse requests that match the conditions you specified.



(Optional) If you selected the Block action, you can configure a custom response.



To save and deploy your rule, select Deploy. If you are not ready to deploy your rule, select Save as Draft.







Configure a custom response for blocked requests



Note


This feature is only available on Pro plans and above.



When you select the Block action in a rule you can optionally define a custom response.

The custom response has three settings:


With response type: Choose a content type or the default WAF block response from the list. The available custom response types are the following:

Dashboard value	API value
Custom HTML	"text/html"
Custom Text	"text/plain"
Custom JSON	"application/json"
Custom XML	"text/xml"

With response code: Choose an HTTP status code for the response, in the range 400-499. The default response code is 403.



Response body: The body of the response. Configure a valid body according to the response type you selected. The maximum field size is 2 KB.



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