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Available Managed Transforms

​​ HTTP request headers

Add bot protection headers

Adds HTTP request headers with bot-related values:

  • cf-bot-score: Contains the bot score (for example, 30).
  • cf-verified-bot: Contains true if the request comes from a verified bot, or false otherwise.
  • cf-threat-score: Contains the threat score (0-100).
  • cf-ja3-hash: Contains the JA3 fingerprint.

This Managed Transform requires a Enterprise plan with Bot Management enabled.

Add TLS client auth headers

Adds HTTP request headers with Mutual TLS (mTLS) client authentication values:

Add visitor location headers

Adds HTTP request headers with location information for the visitor's IP address. The added headers are:

  • cf-ipcity: The visitor's city (value from the field).
  • cf-ipcountry: The visitor's country (value from the field).
  • cf-ipcontinent: The visitor's continent (value from the ip.src.continent field).
  • cf-iplongitude: The visitor's longitude (value from the ip.src.lon field).
  • cf-iplatitude: The visitor's latitude (value from the field).
  • cf-region: The visitor's region (value from the ip.src.region field).
  • cf-region-code: The code of the visitor's ISO 3166-2 first-level region (value from the ip.src.region_code field).
  • cf-metro-code: The visitor's metro code (value from the ip.src.metro_code field).
  • cf-postal-code: The visitor's postal code (value from the ip.src.postal_code field).
  • cf-timezone: The name of the visitor's timezone (value from the field).
Add "True-Client-IP" header

Adds a true-client-ip request header with the visitor's IP address.

Only available on Enterprise plans.

Unavailable when Remove visitor IP headers is enabled.

Remove visitor IP headers

Removes HTTP request headers that may contain the visitor's IP address. Handles the following HTTP request headers:

  • cf-connecting-ip
  • x-forwarded-for (refer to the notes below)
  • true-client-ip

Unavailable when Add "True-Client-IP" header is enabled.

​​ Visitor IP address in the x-forwarded-for HTTP header

For the x-forwarded-for HTTP request header, enabling Remove visitor IP headers will only remove the visitor IP from the header value when Cloudflare receives a request proxied by at least another CDN (content delivery network). In this case, Cloudflare will only keep the IP address of the last proxy.

For example, consider an incoming request proxied by two CDNs (CDN_1 and CDN_2) before reaching the Cloudflare network. The x-forwarded-for header would be similar to the following:

With Remove visitor IP headers enabled, the x-forwarded-for header sent to the origin server will be:
x-forwarded-for: <THIRD_PARTY_CDN_2_IP>

​​ HTTP response headers

Remove "X-Powered-By" headers

Removes the X-Powered-By HTTP response header that provides information about the application at the origin server that handled the request.

Add security headers

Adds several security-related HTTP response headers. The added response headers and values are the following:

  • x-content-type-options: nosniff
  • x-xss-protection: 1; mode=block
  • x-frame-options: SAMEORIGIN
  • referrer-policy: same-origin
  • expect-ct: max-age=86400, enforce

To increase protection, enable HTTP Strict Transport Security (HSTS) for your website.