If you use a firewall, you must configure it so that OKD can access the sites that it requires to function. You must always grant access to some sites, and you grant access to more if you use Red Hat Insights, the Telemetry service, a cloud to host your cluster, and certain build strategies.

Configuring your firewall for OKD

Before you install OKD, you must configure your firewall to grant access to the sites that OKD requires.

  1. Whitelist the following registry URLs:

    URL Function


    Provides core container images


    Provides core container images


    The https://cloud.redhat.com/openshift site uses authentication from sso.redhat.com

  2. Whitelist any site that provides resources for a language or framework that your builds require.

  3. If you do not disable Telemetry, you must grant access to the following URLs to access Red Hat Insights:

    URL Function


    Required for Telemetry


    Required for Telemetry


    Required for Telemetry


    Required for Telemetry and for insights-operator

  4. If you use Amazon Web Services (AWS), Microsoft Azure, or Google Cloud Platform (GCP) to host your cluster, you must grant access to the URLs that provide the cloud provider API and DNS for that cloud:

    Cloud URL Function



    Required to access AWS services and resources. Review the AWS Service Endpoints in the AWS documentation to determine the exact endpoints to allow for the regions that you use.



    Required to access GCP services and resources. Review Cloud Endpoints in the GCP documentation to determine the endpoints to allow for your APIs.


    Required to access your GCP account.



    Required to access Azure services and resources. Review the Azure REST API Reference in the Azure documentation to determine the endpoints to allow for your APIs.

  5. Whitelist the following URLs:

    URL Function


    Required to access mirrored installation content and images


    Required by the Quay CDN to deliver the Quay.io images that the cluster requires


    Required to access the default cluster routes unless you set an ingress wildcard during installation


    Required to access Quay image content in AWS


    Required to check if updates are available for the cluster


    Required to download Fedora CoreOS (FCOS) images


    Required for your cluster token


    Required for your cluster token