Using Resolve Override in Page Rules

​​ Overview

Cloudflare Page Rules allows you to override the URL or IP address of a request.

A common use case for this functionality is when you are serving an application from the URI (e.g. mydomain.com/app). In this case the ‘app’ may live on another server and may even be hosted by a third party. Requests to this endpoint must be directed to the server for that third party application. You can specify a CNAME host.

To make sure you have full control of these records, it is recommended that you set the Resolve Override within the same zone name.

To configure a resolve override in Page Rules, do the following:

1. Create a DNS record Open external link (either CNAME or A record) for your domain.

• This example shows a CNAME record setup to point to domain.s3.amazonaws.com.
  • Type: CNAME
  • Name: resolve.example.com
  • Target: domain.s3.amazonaws.com
  • TTL: Auto
  • Proxy status: Proxied (orange cloud icon)
• This example uses an A record to point to a web server IP address.
  • Type: A
  • Name: resolve.example.com
  • IPv4 address: 1.2.3.4
  • TTL: Auto
  • Proxy status: Proxied (orange cloud icon)

2. Create a Page Rule Open external link to override a URL or an IP address.

• The following example Page Rule configuration would send all requests from a folder (/app) to an AWS S3 bucket:
  • If the URL matches: example.com/app/*
  • Setting: Resolve Override | Value: resolve.example.com
  • Setting: Host Header Override | Value: examplebucket.s3.amazonaws.com