Ubuntu 11.04 Static IP

Hi,

I am currently looking over the Ubuntu server guide* and it talks about configuring a static IP address assignment.

Making the following changes in the /etc/network/interfaces file (changing the address details):

> auto eth0

iface eth0 inet static

address 10.0.0.100

netmask 255.255.255.0

gateway 10.0.0.1

Is this necessary and if so why would you want to do this?

*~~[https://help.ubuntu.com/11.04/serverguide/C/network-configuration.html" target="_blank">](https://help.ubuntu.com/11.04/servergui … ation.html">https://help.ubuntu.com/11.04/serverguide/C/network-configuration.html](

2 Replies

I believe it is needed if you want to use a local LAN IP as well as the public IP. You have a single interface in your linode so supporting multiple IP's comes by defining virtual interfaces.

@tech4him:

I believe it is needed if you want to use a local LAN IP as well as the public IP. You have a single interface in your linode so supporting multiple IP's comes by defining virtual interfaces.

Ya know, I noticed this in the Linode static IP config article. But it seems it's totally possible to keep your external IP using DHCP, and use a static IP for your internal; something like:

/etc/network/interfaces:

The primary network interface

auto eth0 eth0:0

iface eth0 inet dhcp

iface eth0:0 inet static

address 10.0.0.2

netmask 255.255.255.0

Is there anything wrong with doing it this way? I'm wondering if there's a specific reason behind the way the linode article is written.

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