Adding an IPv6 Address on your VPS

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• Login to https://crownpanel.com --> Select the VPS you wish to setup IPv6 for by clicking on "Manage" and then click on the "Manage Network" tab
• Here you will find the following values, IPv6_RANGE, GATEWAY and NETMASK
• eg:
• Here for example, the range is "2a0a:51c0:0:1f::/64" while the first usable IPv6_ADDRESS would be 2a0a:51c0:0:1f::2 and NETMASK is 64.

CentOS

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Edit the file eth0 (or similar) config file,

nano /etc/sysconfig/network-scripts/ifcfg-eth0

If your network interface isn't eth0, you can find it by checking,

ifconfig

and then editing that config, replacing NETWORK_INTERFACE with the correct network interface,

nano /etc/sysconfig/network-scripts/ifcfg-NETWORK_INTERFACE

And then add the following to the end of the file,

IPV6INIT=yes
IPV6ADDR="IPv6_ADDRESS/NETMASK"
IPV6_AUTOCONF=yes

Information for the IPv6_RANGE/NETMASK can be found from CrownPanel.

Save the file and then,

systemctl restart network

Ubuntu

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Edit the /etc/network/interfaces file,

nano /etc/network/interfaces

Append configuration as follows:

iface eth0 inet6 static
address IPv6_ADDRESS
netmask NETMASK
gateway GATEWAY

Save and close the file. You can reboot the server or restart networking (For Ubuntu versions older than 16.04) service:

/etc/init.d/networking restart

If you are using systemd (Ubuntu Linux 16.04 LTS server and above), enter:

 systemctl restart networking

Debian

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Open /etc/network/interfaces file,

nano /etc/network/interfaces

Append configuration as follows:

iface eth0 inet6 static
pre-up modprobe ipv6 
address IPv6_ADDRESS
netmask NETMASK
gateway GATEWAY

Save and close the file. Restart the networking:

 /etc/init.d/networking restart

Testing IPv6 Connectivity

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ping6 ipv6.google.com