Adding additional IP addresses can be done one of two ways.
- Add IP addresses to the same network adapter as secondary IP addresses (the normal way)
- Add an IP address to each, seperate network adapters.
To say the least, the second option is not the most desirable as you would have a limited number of network adapters available, even on a physical machine. For additional, seperate network adapters, the goal is to connect to a private or other network.
On ProfitBricks, you can perform either one of these but option 1 will be the most chosen.
Note: This will require at least one (1) dedicated reserved IP address
1) Reserve your IP addresses using the
IP Manager at the top menu bar.
2) Add the IP address you reserved to the "Additional IPs" section of your servers Network properties:
3) Provision Changes
4) All public IP spaces that are assigned to servers will be part of a
/24 network (Netmask 255.255.255.0).
RedHat EL / CentOS
5) Navigate to
6) Here, you will see the configurations for the current public adapter which is most likely
# cat ifcfg-eth0 DEVICE="eth0" BOOTPROTO=none HWADDR=02:01:A2:3E:94:97 IPADDR=126.96.36.199 NETMASK=255.255.255.0 GATEWAY=188.8.131.52 ONBOOT="yes"
7) Create a copy if
ifcfg-eth0 and name it
# cd /etc/sysconfig/network-scripts/
cp ifcfg-eth0 ifcfg-eth0:1
8) Edit this new configuration to be the configuration for your second IP address. As this is a secondary IP address, it should not be necessary to leave in the default gateway or hardware MAC address:
# cp ifcfg-eth0 ifcfg-eth0:1
DEVICE="eth0:1" BOOTPROTO=none IPADDR=184.108.40.206 NETMASK=255.255.255.0 ONBOOT="yes"
9) Bring up
# ifup eth0:1
eth0:1 Link encap:Ethernet HWaddr 02:01:A2:3E:94:97 inet addr:220.127.116.11 Bcast:18.104.22.168 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:64000 Metric:1
10) To test and ensure it is working as expected, ping the IP from a different host:
$ ping -c 4 22.214.171.124 PING 126.96.36.199 (188.8.131.52) 56(84) bytes of data. 64 bytes from 184.108.40.206: icmp_seq=1 ttl=62 time=0.609 ms 64 bytes from 220.127.116.11: icmp_seq=2 ttl=62 time=2.15 ms 64 bytes from 18.104.22.168: icmp_seq=3 ttl=62 time=0.950 ms 64 bytes from 22.214.171.124: icmp_seq=4 ttl=62 time=0.975 ms
--- 126.96.36.199 ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3003ms rtt min/avg/max/mdev = 0.609/1.172/2.157/0.587 ms
Note: Each subsequent adapter would be named eth0:2, eth0:3, accordingly.
Debian / Ubuntu
5) Navigate to /etc/network/interfaces
6) Current contents should look something like:
auto eth0 iface eth0 inet static address 192.168.0.2 gateway 192.168.0.1 netmask 255.255.255.0 network 192.168.0.0 broadcast 192.168.0.255
7) Append the following and be sure to alter the configuration depending on your secondary IP address:
auto eth0:1 iface eth0:1 inet static address 10.10.10.2 netmask 255.255.255.0
Windows Server 2003/2008/2012
5) Open your network adapters Properties by right clicking the respective adapter in which you wish to add the secondary virtual IP address to.
6) On the Networking tab, scroll down until you see Internet Protocol Version 4 (TCP/IPv4). Highlight this property.
7) After selecting the above property, click the Properties button in the bottom left hand corner.
8) Click the Advanced button.
9) In the IP Settings tab, add your secondary IP addresses and their netmasks to this section.
10) Save all changes by clicking OK or APPLY on your way out.