A CustomResponse action causes the URL Rewrite Module to respond to the HTTP client by using a user-specified status code, subcode, and reason. Use of a CustomResponse action implies that no subsequent rules are evaluated for the current URL after this action is performed.
CustomResponse action has the following configuration options:
statusCode – Specifies the status code to use in response to the client.
subStatusCode – Specifies the substatus code to use in response to the client.
statusReason – Specifies the reason phrase to use with the status code.
statusDescription – Specifies the one line description to put in the body of the response.