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VPN servers, according to many manuals on the Internet and for different VPN services, often work only under TCPv4 protocol. If your ISP provides you with IPv6 addresses together with IPv4, you must disable IPv6 to avoid information leaks.
First of all, you need to check if you have IPv6 protocol support enabled. Try to open the following links:
https://ipv6.google.com - should not open in a browser
https://www.test-ipv6.com/index.html.ru_RU - online IPv6
verification If IPv6 verification showed that this protocol has You are not available, you can skip reading this material. Otherwise, I recommend disabling IPv6 support according to this instruction, using the example of Windows 7
Open the "Network Management and Sharing Center"
in the window that opens, go to the "Change adapter settings"
Right-click the network adapter and select "Properties" menu item
in the window that opens, uncheck "Internet Protocol Version 6" and click "OK"
Similar actions It is recommended to perform with all network adapters in your system.
After doing the manipulations, again check the availability of IPv6, as indicated at the beginning of this material.
First of all, you need to check if you have IPv6 protocol support enabled. Try to open the following links:
https://ipv6.google.com - should not open in a browser
https://www.test-ipv6.com/index.html.ru_RU - online IPv6
verification If IPv6 verification showed that this protocol has You are not available, you can skip reading this material. Otherwise, I recommend disabling IPv6 support according to this instruction, using the example of Windows 7
Open the "Network Management and Sharing Center"
in the window that opens, go to the "Change adapter settings"
Right-click the network adapter and select "Properties" menu item
in the window that opens, uncheck "Internet Protocol Version 6" and click "OK"
Similar actions It is recommended to perform with all network adapters in your system.
After doing the manipulations, again check the availability of IPv6, as indicated at the beginning of this material.