// Module included in the following assemblies:
//
// * rosa_planning/rosa-cloud-expert-prereq-checklist.adoc
:_mod-docs-content-type: CONCEPT
[id="mos-checklist-_firewall_{context}"]
= Firewall

[role="_abstract"]
You must configure your firewall so that your cluster can access the required domains and ports.

* Configure your firewall to allow access to the domains and ports listed in
ifdef::openshift-rosa[]
link:https://docs.redhat.com/en/documentation/red_hat_openshift_service_on_aws_classic_architecture/4/html/prepare_your_environment/rosa-cloud-expert-prereq-checklist#firewall[AWS firewall prerequisites].
endif::openshift-rosa[]
ifdef::openshift-rosa-hcp[]
link:https://docs.redhat.com/en/documentation/red_hat_openshift_service_on_aws/4/html/prepare_your_environment/rosa-hcp-prereqs#rosa-hcp-firewall-prerequisites_rosa-hcp-prereqs[AWS firewall prerequisites].
endif::openshift-rosa-hcp[]