The Header Allow/Deny Policy allows the user to control which incoming requests may be forwarded to the backend service. Permission is granted by adding values for a header.
When a request is received, the policy examines the HTTP headers. The configured rules are applied using a regular expression against the names and values. If these are permitted, the request is passed unmodified to the backend API. If they are not allowed, an HTTP 403 response is returned and the call to the backend service is not executed.
Configuration Options
| Option | Description | Possible Values | Default |
|---|---|---|---|
| Header Name | Name of the HTTP header, e.g. Host | Any string. | - |
| Allow request if header is missing | Determines whether the request is considered if a header is missing. | true/false | false |
| Allow request if no rules match | Determines whether the request is considered if no rule applies. | true/false | false |
| Header Rules | |||
| Allow request if value matches | Determines whether the request is considered if the value applies. | true/false | false |
| Header Value Regex | Defines the header value. | Any regex. | - |
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