Document link: https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/8/html-single/installing_identity_management/index#port-requirements-for-idm_preparing-the-system-for-ipa-server-installation

Section number and name:  2.8. Port requirements for IdM

Describe the issue: 

Nowhere in the documentation explicit about the paths that the ports need to be open for. It just says the servers need to accept those connections. Later, there is a note that network firewalls need to allow the communication as well. Also, nowhere does the documentation say which servers need to communicate with which other servers.

This is exactly the sort of documentation the customer is asking for:

IPA servers without CA need to allow following hosts: Servers that have replication agreements, clients.
IPA servers with CA: Servers that have replication agreements, Servers that put it in on it as CA servers, clients.

Impact of this issue: 

Suggestions for improvement: