Now that the server hardware is put together, I needed to set up and configure my firewall.
I found a great article Ben Miller wrote on installing OpenWRT onto a raspberry pi http://computers.tutsplus.com/articles/installing-openwrt-on-a-raspberry-pi-as-a-new-home-firewall–mac-55984, which worked wonderfully for me.
I configured my Raspberry Pi, which I named PiWall, to be a cascaded router on the AT&T modem/router. I had purchased a block of 5 static IP’s as well for e-mail, web servers, sftp, etc.
I set up the PiWall for DHCP on the WAN interface and gave it 192.168.50.1 for the LAN. I picked 192.168.50.0/24 for the IP scheme on the LAN interface.
Having picked my IP scheme I went on to set up the firewall with some basic rules, which included egress filtering.
It was now time to start setting up VMWare. I made a bootable USB stick and started the installation.