Generic firewall docs https://docs.openshift.com/container-platform/4.8/installing/install_config/configuring-firewall.html should mention load balancers because they are a common infrastructure element and often take on the role of an additional firewall in the network. Customers should be aware that if they use SNAT pools or any additional load balancer features, they must configure the load balancer to allow necessary traffic to and from their cluster.

Additionally, troubleshooting steps should be added to https://docs.openshift.com/container-platform/4.8/installing/installing-troubleshooting.html instructing customers that load balancer logs and firewall logs can be valuable resources when troubleshooting network-related installation problems.