Our NAT-only VPS includes a /64 IPv6 subnet, which is disabled by default but can be easily activated using a provided script after a complete system stop.
Since our NAT servers utilize a bridged network setup, the NAT IPv4 NIC cannot simultaneously handle IPv6 traffic. Therefore, additional configuration is required to enable IPv6 support.
During deployment, a second network card is added to your VM's XML configuration. However, to activate it, you must fully stop the system—not just reboot—for at least 10 seconds. Once restarted, the second, unconfigured network card will become visible.
After accessing your server via SSH, navigate to:
/root/IPv6/
There, you will find a read-me file and an executable script to finalize the IPv6 setup. Running this script will enable IPv6 traffic for your instance. You are also welcome to review the script beforehand—it contains commands to configure both network cards.