Creating a UTM using Zentyal

Before starting, remember to save changes in the top right after every step in the GUI.
1. Create bootable USB with the Zentyal ISO on it.
2. Boot and follow through the basic installation.
3. Skip through the basic configuration when it first comes up and take note of the menu that comes up showing which NIC interface is which.
4. Configure the WAN and LAN under "network" and make sure to change the default DNS server.
5. Enable DHCP for the LAN.