casey@cosmos:~$ cat /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0 eth0:0 eth0:1 eth0:2

# eth0 - This is the main IP address that will be used for most outbound connections.
# The address, netmask and gateway are all necessary.
iface eth0 inet static
address 72.**.***.***
netmask 255.255.255.0
gateway 72.**.***.1

# eth0:0
# This is a second public IP address.
iface eth0:0 inet static
address 72.**.***.**
netmask 255.255.255.0

# eth0:1
# This is a third public IP address.
iface eth0:1 inet static
address 173.***.***.**
netmask 255.255.255.0

# eth0:2
# This is a fourth public IP address.
iface eth0:2 inet static
address 66.***.**.**
netmask 255.255.255.0