Your PC is leaking IPv6. The above address has been detected and can allow unwanted parties to see what you do on-line.
Unable to use VPN in China? Please do not contact our support. We are aware of the issue caused by your ISP and we are working on it.
IPv6 is a 128 bit address system of the Internet Protocol (IP) which is used to identify devices on a network. It allows for a significantly higher number of addresses or devices than the currently most deployed IPv4 revision (4, 294, 967, 296 addresses vs (40, 282, 366, 920, 938, 463, 463, 374, 607, 431, 768, 211, 456 addresses).
IPv4 will one day become history as the world slowly moves towards the newer IPv6 standard which removes all real-life scaling issues of its predecessor. Adoption of IPv6, however, has been very slow – mainly due to backward capability issues. While your PC, phone, tablet or even TV support IPv6 already, the vast majority of websites do not.
Because of the limited availability of IPv6 around the world most VPN providers fail to direct IPv6 traffic through the VPN tunnel. If your ISP supports IPv6 and you connect to an IPv6 enabled website, your browser will connect to IPv6 address outside of the VPN connection, using your ISP directly. Your real IPv6 address leaks this way.
Astrill VPN offers IPv6 Leak Protection by disabling IPv6 traffic while connected to our VPN thus providing you with a guarantee that no Internet traffic leaks out over your regular connection while connected to VPN. This feature is optional and can be disabled if required. However IPv6 leak does reduce your on-line anonymity and allows 3rd parties to track your activities. We strongly suggest you use IPv6 leak protection.