How to change ip address correctly in Ispconfig 3?

I am currently running a Ispconfig 3 server with DHCP inside a firewall.

However when I am done with configuration, I want give it a static ip and move it outside of the firewall.

The system is a Ubuntu Server 9.04 Howtoforge Perfect install.

Please tell me how to correctly set a new static ip.

 

Replace in your /etc/network/interfaces the entry for eth0 (or whatever it is for you)

Code:

auto  eth0
iface eth0 inet static
  address   xx.xxx.xx.xx
  broadcast xxx.xxx.xx.xx
  netmask   255.255.255.xxx
  gateway   xx.xxx.xx.x

Code:

/etc/init.d/networking restart