![]() IPv6 leaks can only occur if your device has IPv6 connectivity. This means that websites can’t see your real IPv4 address, but they can see your real IPv6 address. What is an IPv6 leak?Īn IPv6 leak occurs when your IPv4 connection is correctly routed through the VPN interface, but your IPv6 connection is routed via your ISP as normal. The result is most internet services and Operating Systems now operate a dual-stack approach, where (when IPv6 connectivity is available at all) internet traffic is sent over both an IPv4 interface and an IPv6 interface. Unfortunately, although essential to the future growth of the internet, adoption of IPv6 at all levels has been slow. The new IPv6 standard fixes the issue by using addresses much longer, thereby providing an awful lot more of them (around 340 billion billion billion billion!). It means your VPN is not enabled or is not simply not working at all. ![]() This means a website can see your real IPv4 address, and isn't really a “leak” as such. One day, IPv6 addresses (see below) will completely replace IPv4 addresses, but until the new standard is much better supported, even connections with an IPv6 address are also assigned an IPv4 address for compatibility reasons. The IPv4 system has been used for this since the early days of the internet, and IPv4 addresses remain by far the most common type of internet address. What is IPv4?Įvery internet connection is assigned a numerical IP address that computers use to uniquely identify it. Our IP leak tool tests for all known types of IP leak. ![]() If for any reason a website can see your real IP address when using a VPN then you have an IP leak. ![]() All a website (or any other internet resource) should be able to see is the IP address of the VPN server you are connected to. When using a VPN service it should be impossible for any website you visit to identify you by your real unique internet address (IP address). ![]()
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