From e272b7f18b3bd37906dac4b87773261c664005e6 Mon Sep 17 00:00:00 2001 From: Pedro Sousa <680496+pedrosousa@users.noreply.github.com> Date: Wed, 7 Jul 2021 11:24:43 +0100 Subject: [PATCH] Add note about request headers that users cannot modify --- .../src/content/transform/request-header-modification/index.md | 2 ++ 1 file changed, 2 insertions(+) diff --git a/products/rules/src/content/transform/request-header-modification/index.md b/products/rules/src/content/transform/request-header-modification/index.md index 8e88e58e7c86b0f..81df3d5ed03ce6f 100644 --- a/products/rules/src/content/transform/request-header-modification/index.md +++ b/products/rules/src/content/transform/request-header-modification/index.md @@ -18,6 +18,8 @@ You can manipulate the headers of incoming HTTP requests through HTTP Request He * If you modify the value of an existing HTTP request header using an expression that evaluates to an empty string (`""`) or an undefined value, the HTTP request header is **removed**. +* Currently, there is a limited number of HTTP request headers that you cannot modify. Cloudflare may remove restrictions for some of these HTTP request headers when presented with valid use cases. [Create a post in the community](https://community.cloudflare.com) for consideration. + To create an HTTP Request Header Modification Rule in the dashboard, see [Create an HTTP Request Header Modification Rule in the dashboard](/transform/request-header-modification/create-dashboard).