A simple PHP script to generate the iptables rules to import when one needs to set up port forwarding.
Configure a KVM private NAT with a guest acting as a gateway to the outside world. Internal guests will be accessible from the outside world via a reverse proxy and port-forwarding rules.
Limit a computer's bandwidth to the internet, so the rest of your household don't get starved.
Set a static IP on your ubuntu 18.04 server using netplan.
This tutorial will ensure you have a running default network on your KVM server.