---
title: Custom response codes
summary: null
url: >-
  https://www.fastly.com/documentation/reference/changes/2023/04/custom-response-codes
---

We've expanded the functionality of our [custom response codes feature](https://www.fastly.com/documentation/guides/next-gen-waf/agent-response-codes/using-custom-agent-response-codes). Custom response codes allow you to specify the HTTP status code that is returned when a request to your web application is blocked.

Specifically, you can now change the site default blocking response code from `406` to an alternative response code. Blocking actions use the site default blocking response code unless a different response code is specified in a rule.

We also now support the `301` and `302` custom response codes and allow you to specify a redirect URL.