Skip to content
Cloudflare Docs

Supported cloud providers

Cloud Connector currently supports the following cloud providers and services:

  • Cloudflare R2
  • Amazon Web Services - S3
  • Google Cloud Platform - Cloud Storage
  • Microsoft Azure - Blob Storage

Cloudflare R2

The Cloudflare R2 bucket must be public and exposed using a custom domain. Buckets exposed using an r2.dev subdomain are not supported.

Additionally, the custom domain must be defined in the same zone where you are configuring the Cloud Connector rule.

Amazon Web Services - S3

The hostname of your S3 bucket URL must have one of the following formats (where * is a wildcard character):

  • *s3.amazonaws.com
  • *s3.<REGION>.amazonaws.com
  • *s3-website.<REGION>.amazonaws.com
  • *s3-website-<REGION>.amazonaws.com

Cloud Connector supports both subdomain and URI path-style URLs:

  • Subdomain-style URLs: Set the hostname to <BUCKET_NAME>.s3.amazonaws.com. In this case, your files are accessible directly under the root of the bucket. For example, https://example.com/index.html will map to https://<BUCKET_NAME>.s3.amazonaws.com/index.html.
  • URI path-style URLs: Set the hostname to s3.amazonaws.com. Here, your bucket name must be part of the URI path in your requests. For example, if your bucket name is <BUCKET_NAME>, files will be available on paths like https://example.com/<BUCKET_NAME>/index.html, and your Cloud Connector rule should filter traffic based on the URI path starting with /<BUCKET_NAME>.

SSL connections to AWS S3 endpoints

The SSL setting applied to requests between Cloud Connector and AWS S3 depends on the type of S3 endpoint you use:

  • HTTPS-supported endpoints: For hostnames like *s3.<REGION>.amazonaws.com and *s3.amazonaws.com, Cloudflare will connect to AWS S3 over HTTPS if you set your zone's SSL/TLS mode to Full or Full (Strict).
  • Non-HTTPS endpoints: For website-style hostnames such as *s3-website.<REGION>.amazonaws.com or *s3-website-<REGION>.amazonaws.com, which do not support HTTPS, Cloudflare will default to Flexible SSL.

Get the bucket URL

  1. Go to the Amazon S3 console ↗ and select Buckets in the navigation pane.
  2. Select the bucket name.
  3. Go to the Properties tab.
  4. Select the Static Website Hosting card. The Endpoint field shows your bucket URL.

For more information, refer to the Amazon S3 documentation ↗.

Once you configure Cloud Connector with your storage provider's public bucket, you may wish that only Cloudflare can access the objects in that bucket. To achieve this, check your provider's documentation on how to create a policy that only allows incoming requests from Cloudflare IP addresses ↗.

Google Cloud Platform - Cloud Storage

The hostname of your Cloud Storage bucket URL must be the following (where * is a wildcard character):

  • *storage.googleapis.com
  • *storage.cloud.google.com

Cloud Connector supports both subdomain and URI path-style URLs:

  • Subdomain-style URLs: Set the hostname to <BUCKET_NAME>.storage.googleapis.com. In this case, your files are accessible directly under the root of the bucket. For example, https://example.com/index.html will map to https://<BUCKET_NAME>.storage.googleapis.com/index.html.
  • URI path-style URLs: Set the hostname to storage.googleapis.com. Here, your bucket name must be part of the URI path in your requests. For example, if your bucket name is <BUCKET_NAME>, files will be available on paths like https://example.com/<BUCKET_NAME>/index.html, and your Cloud Connector rule should filter traffic based on the URI path starting with /<BUCKET_NAME>.

Get the bucket URL

  1. Go to the Google Cloud console ↗ and select Buckets.

  2. Select the bucket name.

  3. For one of the files already in the bucket, select the link icon in the Public column to copy the file's public URL to the clipboard. The file URL will have the following format:

    https://storage.googleapis.com/<BUCKET_NAME>/<OBJECT_NAME>

    To obtain the subdomain bucket URL, refactor the file URL to <BUCKET_NAME>.storage.googleapis.com format.
    To obtain the URI path bucket URL, remove https:// and /<BUCKET_NAME>/<OBJECT_NAME> from the file URL.

If the files in your bucket are not publicly accessible, you must change the bucket permissions. For details, refer to the Google Cloud Storage documentation ↗.

Once you configure Cloud Connector with your storage provider's public bucket, you may wish that only Cloudflare can access the objects in that bucket. To achieve this, check your provider's documentation on how to create a policy that only allows incoming requests from Cloudflare IP addresses ↗.

Microsoft Azure - Blob Storage

The hostname of your Blob Storage bucket URL must have one of the following formats:

  • <BUCKET_NAME>.blob.core.windows.net
  • <BUCKET_NAME>.web.core.windows.net

For Azure Blog Storage, Cloud Connector supports only subdomain URLs like <BUCKET_NAME>.blob.core.windows.net. This means that your files will be accessible directly under the root of the bucket. For example, https://example.com/index.html will map to https://<BUCKET_NAME>.blob.core.windows.net/index.html.

Get the bucket URL

  1. Go to the Azure portal ↗ and select your storage account.
  2. In the menu pane, under Settings, select Endpoints.
  3. Get your bucket URL from the Blob service endpoint or the Static website endpoint.

If the blob container is not configured for public access, you must change the container settings. For details, refer to the Azure Storage documentation ↗.

Once you configure Cloud Connector with your storage provider's public bucket, you may wish that only Cloudflare can access the objects in that bucket. To achieve this, check your provider's documentation on how to create a policy that only allows incoming requests from Cloudflare IP addresses ↗.

Cloudflare DashboardDiscordCommunityLearning CenterSupport Portal
Cookie Settings