Back-end installation section should explain how to "block the ports"

[smithfarm]

The Back-end installation section of the Admin Guide ends with a Warning:

"The commands start services which are accessible from the outside. Do not do this on a system connected to an untrusted network or make sure to block the ports with a firewall."

Readers might be perplexed that the documentation issues a dire warning to "block the ports" without mentioning which ports should be blocked.

If the services table had a fourth column, "Communicates over port(s)", then question "which ports are they talking about?" would not arise.