Future Internet infrastructure will use IPv6 addresses instead of the more and more obsolete IPv4 addresses of older days. The update became necessary, because the availability of IPv4 addresses is limited (4 billions possible) and the modern Internet needs way more addresses than IPv4 could provide. IPv6 can accomplish that.
The main obvious difference between both techniques is the address type:
- 2001:0db8:85a3:08d3:1319:8a2e:0370:7344 (IPv6)
- 192.168.030.234 (IPv4)
Also notable is that, while IPv4 addresses change on a more or less daily base, an IPv6 address will accompany a user for a long time.
Is CyberGhost IPv6 compatible?
Yes. Your IPv6 traffic will be forced automatically inside the encrypted VPN tunnel. In case a server doesn't support IPv6, the internal firewall will immediately block IPv6 packages.
CAUTION FOR NATIVE PROTOCOL USERS: If using a native VPN protocol please make sure that your VPN protocol software supports the Internet protocol IPv6 along with IPv4 or run an IPv4 Internet connection only. Many Internet Service Providers connect with the IPv6 protocol or offer both protocols, IPv4 and IPv6, at the same time and as long as a native VPN protocol doesn't support IPv6 you risk data leaks, since an IPv6 connection can bypass the tunneled IPv4 connection. However, the CyberGhost client does support IPv6 and therefor prevent IPv6 leaks, users of native VPN protocols need to deactivate the IPv6 Internet protocol manually.
Important note for native OpenVPN users on Windows to avoid data leaks: Native OpenVPN uses the same adapter as the CyberGhost Windows client does. Since CyberGhost forces the adapter to activate IPv6 support, it might happen that data leaks when using the native protocol connection, if a server doesn't support IPv6 (the firewall just handles client controlled connections).
If that is the case, please open the Windows registry, search for 'CyberGhost' and set the entry 'DisableIpv6Protocol' to true. Make sure you closed CyberGhost completely before changing the setting.