• Solution finder
    • Help & contact
    • Spring Offers
      %
    • Solution finder
    Home Server & Cloud Infrastructure Dedicated Server Dedicated Server: Adding a Public IPv4 Address

    Adding Public IPv4 and IPv6 Addresses on a Dedicated Server (Ubuntu 20.04/22.04 or Debian 11/12)

    This article explains how to add additional public IPv4 and IPv6 addresses on a Dedicated Server running Ubuntu 20.04, 22.04, Debian 11 and 12.

    Attention

    These instructions are valid only for the Dedicated Server. How to add IPv4 addresses and IPv6 addresses on a Cloud Server is described in the following article:

    Adding Public IPv4 and IPv6 Addresses on a Cloud Server or vServer (Ubuntu 18.04, Ubuntu 20.04, Debian 10, 11 and Debian 12)

    Configuring Public IPv4 and IPv6 Addresses on a Cloud Server or vServer with netplan (Ubuntu 22.04)

    How to configure an additional public IPv4 address in Ubuntu 20.04, 22.04, Debian 11 and 12:

    Requirements

    • You have assigned an additional, public IPv4 address to your server in the Cloud Panel.

    • You have logged in to the server as an administrator.

    • Determine the file name of the network interface. To do this, enter the following command:

      [root@localhost ~]# ip addr

    • Make a note of the network interface name.

    • Open the /etc/network/interfaces file with the vi editor.

      [root@localhost ~]# vi /etc/network/interfaces

    Note

    The vi editor has an insert mode and a command mode. You can enter the insert mode by pressing the [i] key. In this mode, the entered characters are immediately inserted into the text. To enter the command mode, press [ESC] afterwards. When you use the command mode, your keyboard inputs are interpreted as a command.

    • Replace the existing entries with the information below:

      source /etc/network/interfaces.d/*

      # The loopback network interface
      auto lo 
      iface lo inet loopback

      allow-hotplug NETWORKINTERFACE
      iface NETWORKINTERFACE inet static
       address MAIN-IPv4-ADDRESS/32
      netmask 255.255.255.255
      gateway 10.255.255.1

      auto NETWORKINTERFACE:0
      allow-hotplug NETWORKINTERFACE:0
      iface NETWORKINTERFACE:0 inet static
       address ADDITIONAL-IPv4-ADDRESS/32

      iface NETWORKINTERFACE inet6 manual
      iface NETWORKINTERFACE inet6 static
          address MAIN-IPv6-ADDRESS
          netmask 64

      iface NETWORKINTERFACE inet6 static
          address ADDITIONAL-IPv6-ADDRESS
          netmask 64

      Example:

      source /etc/network/interfaces.d/*

      # The loopback network interface
      auto lo
      iface lo inet loopback

      allow-hotplug eth0
      iface eth0 inet static
       address 85.215.105.86/32
      netmask 255.255.255.255
      gateway 10.255.255.1

      auto eth0:0
      allow-hotplug eth0:0
      iface eth0:0 inet static
       address 85.215.109.181/32

      iface eth0 inet6 manual
      iface eth0 inet6 static
          address 2a01:239:0:805d::1
          netmask 64

      iface eth0 inet6 static
          address 2a01:239:0:805d::2
          netmask 64

    • Replace the wildcards and, if necessary, the network interface if it differs.

    • To exit vi and save the file, type the command :wq and then press Enter.

    • To reboot the server, type the following command:

      [root@localhost ~]# systemctl reboot

    • To verify that the additional IPv4 and IPv6 addresses have been added, type the following command:

      [root@localhost ~]# ip addr

      The additional public IPv4 and IPv6 addresses are then displayed. Example:

      root@FC01C67:~# ip addr
      1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
          link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
          inet 127.0.0.1/8 scope host lo
             valid_lft forever preferred_lft forever
          inet6 ::1/128 scope host
             valid_lft forever preferred_lft forever
      2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
          link/ether 3c:ec:ef:91:f6:04 brd ff:ff:ff:ff:ff:ff
          altname eno1np0
          altname enp198s0f0np0
          inet 85.215.105.86/32 brd 85.215.105.86 scope global eth0
             valid_lft forever preferred_lft forever
          inet 85.215.109.181/32 brd 85.215.109.181 scope global eth0:0
             valid_lft forever preferred_lft forever
          inet6 2a01:239:0:805d::3/64 scope global
             valid_lft forever preferred_lft forever
          inet6 2a01:239:0:805d::2/64 scope global
             valid_lft forever preferred_lft forever
          inet6 2a01:239:0:805d::1/64 scope global
             valid_lft forever preferred_lft forever
          inet6 fe80::3eec:efff:fe91:f604/64 scope link
             valid_lft forever preferred_lft forever
      3: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
          link/ether 3c:ec:ef:91:f6:05 brd ff:ff:ff:ff:ff:ff
          altname eno2np1
          altname enp198s0f1np1