Additional IPs

You may use the information below ONLY if you still have one of the old additional IPs.

Each additional IP is linked to a principal IP, it is therefore an alias of the principal IP of your server.

The additional IPs are divided into /27 blocks, you have to find the details of your configuration (address/netmask/broadcast) by using the command iptraf - or by clicking on the address you want to configure in your management console.

sd-276:~# ipcalc 88.191.200.44/27
Address:   88.191.200.44        01011000.10111111.11001000.001 01100
Netmask:   255.255.255.224 = 27 11111111.11111111.11111111.111 00000
Wildcard:  0.0.0.31             00000000.00000000.00000000.000 11111
=>
Network:   88.191.200.32/27     01011000.10111111.11001000.001 00000
HostMin:   88.191.200.33        01011000.10111111.11001000.001 00001
HostMax:   88.191.200.62        01011000.10111111.11001000.001 11110
Broadcast: 88.191.200.63        01011000.10111111.11001000.001 11111
Hosts/Net: 30                   Class A

You are now able to configure the alias in your network configuration file, for more information you may check the example of a configuration file below or in the documentation of your favorite distribution.

Example of the network configuration on Debian/Ubuntu:

sd-276:~# cat /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet static
        address 88.191.12.37
        netmask 255.255.255.0
        network 88.191.12.0
        broadcast 88.191.12.255
        gateway 88.191.12.1

auto eth0:0
iface eth0:0 inet static
        address 88.191.200.44
        netmask 255.255.255.224
        network 88.191.200.32
        broadcast 88.191.200.63

auto eth0:1
iface eth0:1 inet static
        address 88.191.200.45
        netmask 255.255.255.224
        network 88.191.200.32
        broadcast 88.191.200.63

Example of the configuration for Mandriva:

sd-276:~# cat /etc/sysconfig/network-scripts/ifcfg-eth0:0
DEVICE=eth0:0
BOOTPROTO=static
IPADDR=88.191.200.44
NETMASK=255.255.255.224
ONBOOT=yes
METRIC=10
MII_NOT_SUPPORTED=yes
USERCTL=no
IPV6INIT=no
IPV6TO4INIT=no
PEERDNS=yes

sd-276:~# ifup eth0:0