Ruined "Ruby Iptables NEtwork Displayer" draws a svg from your Linux IP tables generated from "iptables-save".
It allows you to monitor your network, helps to see activated (allowed) services to graph it.
One of the benefits is to see in one shot any error you could have done for your firewall configuration.
These details are provided for information only. No information here is legal advice and should not be used as such.