The communication matrix project aims to automatically generate an accurate and up-to-date communication flows matrix that can be delivered to customers as part of product documentation for all ingress flows of OpenShift (see documented communication matrix example[https://docs.openshift.com/container-platform/4.16/installing/install_config/configuring-firewall.html#network-flow-matrix_configuring-firewall]).
Port 9447 is documented in the  bare metal multi node communication matrix although the port is not open in versions 4.18 and abpove.

Extract open ports in a  4.18 (or above) bare metal multi node cluster, notice that port 9447 does not appear while it is documented in the corresponding versioned communication matrix.

1. Open the documented communication matrix (see example for 4.18: https://docs.redhat.com/en/documentation/openshift_container_platform/4.18/html/installation_configuration/configuring-firewall#network-[…]-firewall)

Get open ports:
Make sure the `ss` command is available within your pod - if not use the following command to install iprune2 on your pod: `dnf install -y iproute`
In order to get ports using TCP protocol run from your node:
`ss -anpltH`
In order to get ports using UDP protocol run from your node:
`ss -anpluH`  

2.Check if port 9447 does or does not appear in both open ports matrix and documented commatrix.
    

Port 9447 doesn't appear in open port matrix, but does appear in documented communication matrix.

Port 9447 shouldn't appear in documented communication matrix versions 4.18 and above.