Adding additional IP's to your server

Below you will find the information regarding how to setup the additional IP's you have purchased

Windows Server 2008-2012

The first thing you will need to do is to login to your server as an administrator, then carry out the following steps;

1. Navigate to the Start menu and click Control Panel
2. Go to "Network and Internet"
3. Then "Network and Sharing Center"




4. From here you will want to select your network adapter (generally called 'Ethernet')
5. Next click Properties
6. Now navigate down to 'Internet Protocol Version 4 (TCP/IPv4)' and select it




7. Select Properties and then select Advanced
8. Now simply select Add under your 'IP Addresses' and enter your new address as well as it's subnet mask (Leave this the same)




9. Once saved open up a Command Prompt window and enter the following command to confirm it has worked;
ipconfig /all

Debian / Ubuntu

Updating your Debian/Ubuntu IP's can be done either via command line or manually if you are using a desktop environment, this guide will show you how to do this via command line

1. The first thing we will need to do is to backup our current network configuration in-case we make any mistakes, to do this run the following command;
sudo cp /etc/network/interfaces /etc/network/backup
2. Next we will want to begin editing the interfaces file, to do this run the following;
sudo nano /etc/network/interfaces

You can use the command line editor of your choice to edit this file



3. You will now be greeted with the following information;




4. This is where you will add the additional IP's, following the same format as the current address
5. Leave the gateway and netmask the same unless specified otherwise




6. Finally run the following command to enable the changes if you are running Ubuntu 12.04 or earlier
/etc/init.d/networking restart


Otherwise, if you are running any newer versions run the following command. Replace X with the adapter that you wish to reset;

ifconfig ethX down && ifconfig ethX up


CentOS

Updating CentOS works very similarly to updating Ubuntu, however a few of the steps do differ. This information is useful if you only have a few IP's to add, not an entire range.

1. The first thing we will need to do is to backup our current network configuration in-case we make any mistakes, to do this run the following command;
cp /etc/sysconfig/network-scripts/ifcfg-eth0 /etc/sysconfig/network-scripts/ifcfg-eth0-backup
2. Next we will want to copy our current config for eth0 and create our new config
cp ifcfg-eth0 ifcfg-eth0:0

You can add as many addresses as you wish here by incrementing eth0:0 by 1 (eth0:1, eth0:2)



3. You will now want to edit your newly created configs by running the following command
nano ifcfg-eth0:0

4. Now edit the IP address to your additional IP. Do not change any other settings unless specified otherwise.


5. Once complete save the file and run the following command;
etc/init.d/network restart

If all of the steps have been followed correctly then your server should now be able to use the additional IP address you have assigned.