How to configure an IPv6 subnet on a Dedibox running Linux

How to configure IPv6 on Debian

1. Open the network configuration file /etc/network/interfaces in a text editor and edit it as follows:

   auto eno1iface eno1 inet6 static    address IPV6ADDRESS    netmask PREFIXLENGTHCopy code

   Remember to replace eno1 with the proper Internet interface name.

2. Restart the network:

   sudo systemctl restart networkingCopy code

How to configure IPv6 on Debian without systemd

If you do not want to use systemd to start your services, use the following configuration.

1. Open the network configuration file /etc/network/interfaces in a text editor and edit it as follows:

   iface eno1 inet6 static    pre-up modprobe ipv6    pre-up dhclient -cf /etc/dhcp/dhclient6.conf -6 -P -d -v $IFACE    address IPV6ADDRESS    netmask PREFIXLENCopy code

   Adapt the interface name (eno1) to your needs, as well as the IPv6 address and the netmask.

2. Restart the network:

   sudo systemctl restart networkingCopy code

How to configure IPv6 on Ubuntu

Ubuntu uses netplan since the release of Ubuntu 18.04 LTS as network configuration tool. It replaces the classical network configuration with new configuration files, written in YAML format, and located in the /etc/netplan directory. For more information regarding netplan, refer to the official documentation.

1. Open the default configuration file /etc/netplan/01-netcfg.yaml in a text editor, and edit it as follows:

   # This file describes the network interfaces available on your system# For more information, see netplan(5).network:version: 2renderer: networkdethernets:    enp1s0:    dhcp4: no    dhcp6: no    addresses:    - "aaa.bbb.ccc.ddd/24" # The main IP address of your Dedibox server    - "<IPv6_FROM_YOUR_BLOCK>/<SUBNETMASK>" # An IP address from your IPv6 block and it's subnet mask    gateway4: aaa.bbb.ccc.1 # The gateway is the IP address of your Dedibox, ending on .1    nameservers:    addresses: [62.210.16.6, 62.210.16.7]    routes:    - to: 0.0.0.0        via: aaa.bbb.ccc.1        on-link: trueCopy code

   Remember to replace enp1s0 with the proper name of your Internet interface.

2. Check and validate your configuration file.

   sudo netplan –debugCopy code

3. Activate the new configuration:

   sudo netplan applyCopy code

How to configure IPv6 on CentOS

1. Open the automatically generated configuration file for your Internet interface in a text editor, for example /etc/sysconfig/network-scripts/ifcfg-eth0 and edit it as follows:

   # Generated by parse-kickstartUUID=xxxxxDNS1=62.210.16.6BOOTPROTO=noneDEVICE=eth0ONBOOT=yesTYPE=EthernetIPADDR=62.210.xx.xxPREFIX=24GATEWAY=62.210.xx.1DEFROUTE=yesIPV4_FAILURE_FATAL=noIPV6INIT=yesIPV6ADDR="IPV6ADDRESS/PREFIXLEN" IPV6_AUTOCONF=yesNAME="System eth0" Copy code

2. Restart the networking service:

   systemctl restart network.serviceCopy code