How to disable IPv6 on Windows
MultiVPN VPN servers work only on 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 browser
https://www.test-ipv6.com - IPv6 Online Validation
If the IPv6 check showed that this protocol is not available for you, you can skip reading this material. Otherwise, I recommend disabling IPv6 support according to this instruction, using the example of Windows 7
Open Network and Sharing Center
In the window that opens, go to "Change adapter settings"
Right-click the network adapter and select the "Properties" menu item
In the window that opens, turn off "Internet Protocol Version 6" and click "OK"
We recommend that you perform the same steps 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.