Configuration Rules settings

You can change the configuration settings described below in a configuration rule.

Automatic HTTPS Rewrites

Automatic HTTPS Rewrites prevents end users from seeing Mixed content errors by rewriting URLs from http to https for resources or links on your website that can be served with HTTPS.

Use this setting to turn on or off Automatic HTTPS Rewrites for matching requests.

API information

API configuration property name: "automatic_https_rewrites" (boolean).

"action_parameters": {
  "automatic_https_rewrites": true
}

Refer to Create a configuration rule via API for complete API examples.

Browser Integrity Check

Browser Integrity Check blocks access to pages based on specific HTTP headers commonly abused by spammers.

Use this setting to turn on or off Browser Integrity Check for matching requests.

API information

API configuration property name: "bic" (boolean).

"action_parameters": {
  "bic": true
}

Refer to Create a configuration rule via API for complete API examples.

Disable Real User Monitoring (RUM)

Cloudflare Web Analytics, also known as Real User Monitoring (RUM), is Cloudflare's free, privacy-first analytics for your website.

Use this setting to turn off Web Analytics for matching requests.

API information

API configuration property name: "disable_rum" (boolean).

"action_parameters": {
  "disable_rum": true
}

Refer to Create a configuration rule via API for complete API examples.

Disable Zaraz

Cloudflare Zaraz gives you complete control over third-party tools and services for your website, and allows you to offload them to the Cloudflare global network.

Use this setting to turn off Zaraz for matching requests.

API information

API configuration property name: "disable_zaraz" (boolean).

"action_parameters": {
  "disable_zaraz": true
}

Refer to Create a configuration rule via API for complete API examples.

Email Obfuscation

Email Obfuscation prevents spam by hiding email addresses from bots and harvesters while keeping them visible to human visitors to your site.

Use this setting to turn on or off Email Obfuscation for matching requests.

API information

API configuration property name: "email_obfuscation" (boolean).

"action_parameters": {
  "email_obfuscation": false
}

Refer to Create a configuration rule via API for complete API examples.

Fonts

Cloudflare Fonts rewrites Google Fonts to be delivered from a website's own origin, eliminating the need to rely on third-party font providers.

Use this setting to turn on or off Cloudflare Fonts for matching requests.

API information

API configuration property name: "fonts" (boolean).

"action_parameters": {
  "fonts": false
}

Refer to Create a configuration rule via API for complete API examples.

Hotlink Protection

Hotlink Protection prevents your images from being used by other sites, potentially reducing the bandwidth consumed by your origin server.

Use this setting to turn on or off Hotlink Protection for matching requests.

API information

API configuration property name: "hotlink_protection" (boolean).

"action_parameters": {
    "hotlink_protection": false
}

Refer to Create a configuration rule via API for complete API examples.

I'm Under Attack

When enabled, Under Attack mode performs additional security checks to help mitigate layer 7 DDoS attacks. Validated users access your website and suspicious traffic is blocked.

Use this setting to turn on or off Under Attack mode for matching requests.

API information

API configuration property name: "security_level" (string).

API values: "off", "essentially_off", "under_attack".

"action_parameters": {
  "security_level": "under_attack"
}

Refer to Create a configuration rule via API for complete API examples.

Opportunistic Encryption

Opportunistic Encryption allows browsers to access HTTP URIs over an encrypted TLS channel.

Use this setting to turn on or off Opportunistic Encryption for matching requests.

API information

API configuration property name: "opportunistic_encryption" (boolean).

"action_parameters": {
  "opportunistic_encryption": true
}

Refer to Create a configuration rule via API for complete API examples.

Polish

Cloudflare Polish is a one-click image optimization product that automatically optimizes images in your site.

Use this setting to configure Polish for matching requests:

Off
Lossless
Lossy
WebP

Refer to Compression options for more information on these values.

API information

API configuration property name: "polish" (string).

API values: "off", "lossless", "lossy", "webp".

"action_parameters": {
  "polish": "webp"
}

Refer to Create a configuration rule via API for complete API examples.

Request Body Buffering

Use the Request Body Buffering setting to configure the request body buffering mode for matching requests:

Standard (default): Allows Cloudflare products to inspect a prefix of the request body when necessary for enabled functionality on your zone.
Full: Buffers the entire request body before sending the request to your origin server.
None: Strictly no buffering. The request body is streamed directly to the origin server without inspection.

This setting only takes effect on zones running Cloudflare's latest CDN proxy ↗. Enterprise customers can contact their account team to enable the latest proxy on their zones.

API information

API configuration property name: "request_body_buffering" (string).

API values: "standard", "full", "none".

"action_parameters": {
  "request_body_buffering": "full"
}

Refer to Create a configuration rule via API for complete API examples.

Response Body Buffering

Use the Response Body Buffering setting to configure the response body buffering mode for matching requests:

Standard (default): Allows Cloudflare products to inspect a prefix of the response body when necessary for enabled functionality on your zone.
None: Strictly no buffering. The response body is streamed directly to the client without inspection.

This setting only takes effect on zones running Cloudflare's latest CDN proxy ↗. Enterprise customers can contact their account team to enable the latest proxy on their zones.

API information

API configuration property name: "response_body_buffering" (string).

API values: "standard", "none".

"action_parameters": {
  "response_body_buffering": "standard"
}

Refer to Create a configuration rule via API for complete API examples.

Rocket Loader

Rocket Loader prioritizes your website's content (such as text, images, and fonts) by deferring the loading of all your JavaScript code until after rendering.

Use this setting to turn on or off Rocket Loader for matching requests.

API information

API configuration property name: "rocket_loader" (boolean).

"action_parameters": {
  "rocket_loader": true
}

Refer to Create a configuration rule via API for complete API examples.

SSL

SSL/TLS encryption modes control the scheme (http:// or https://) that Cloudflare uses to connect to your origin web server and how SSL certificates presented by your origin will be validated.

Use this setting to configure the SSL/TLS encryption mode for matching requests:

Off
Flexible
Full
Strict
Origin Pull

Refer to Available encryption modes for more information on these values.

API information

API configuration property name: "ssl" (string).

API values: "off", "flexible", "full", "strict", "origin_pull".

"action_parameters": {
  "ssl": "flexible"
}

Refer to Create a configuration rule via API for complete API examples.

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