[Administrator]

If you have a dedicated server or a VPS and you ordered additional IP addresses for your VPN Server, just follow the following instructions in adding IP address to your server.

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cd /etc/sysconfig/network-scripts
Then as a usual precaution I would make a backup of the file

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cp ifcfg-eth0 ifcfg-eth0.bak(you wont need to do anything with the backup)

Then copy the config for your new IP

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cp ifcfg-eth0 ifcfg-eth0:1
Then we need to edit the new config

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vim ifcfg-eth0:1You can use any text editors you want.

The lines you need to change:

DEVICE="eth0"
to
DEVICE="eth0:1"

Then change the
IPADDR="xxx.xxx.xxx.xxx"
to be your NEW ip address (it will have your primary ip listed)

Once this is done, press ESC then type :wq and press enter to save changes

This will have saved the config for you and the interface is ready to be brought up. This is done with

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/sbin/ifup eth0:1
Having done this if you type

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/sbin/ifconfig
You should see something like

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eth0 Link encap:Ethernet HWaddr 00:00:00:00:00:00
inet addr:xxx.xxx.xxx.xxx Bcast:xxx.xxx.xxx.xxx Mask:255.255.254.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:55818546 errors:0 dropped:0 overruns:0 frame:0
TX packets:46167836 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:3299680715 (3146.8 Mb) TX bytes:1890963825 (1803.3 Mb)
Interrupt:11 Base address:0xd000

eth0:1 Link encap:Ethernet HWaddr 00:00:00:00:00:00
inet addr:NEW.IP.ADDRESS Bcast:xxx.xxx.xxx.xxx Mask:255.255.254.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:11 Base address:0xd000

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:241244 errors:0 dropped:0 overruns:0 frame:0
TX packets:241244 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:66571100 (63.4 Mb) TX bytes:66571100 (63.4 Mb)

To add more IP Addresses just repeat the steps above and just increment 1 in eth0:1 to eth0:2