I've requested my ISP to dedicate me a second Internet IP address and have got it. Now I need to configure it (I've never had any experience with using multiple IP addresses on one network interface) on my Ubuntu 10.04 server so that it will be a public address of a VirtualBox (VBoxHeadless) machine (running Ubuntu 10.04 Server as well). Would you be so kind to tell me how can I do so, or at least what docs to read and what specific subjects to google for?


The simple manual way looks like this:

ip address add broadcast + dev eth0

If you want to make this a permanent configuration in /etc/network/interfaces you will have to use the older alias interface syntax (e.g., eth0:1), because that configuration file doesn't support multiple addresses per (primary) interface yet. Add something like this:

auto eth0:1
iface eth0:1 inet static

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