If you’re using a client/openvpn on Windows 10 and you use the block-outside-dns option to prevent DNS leaks then you may experience some serious connection delays.
The easiest way to fix the block-outside-dns connection issue is through the Network and Sharing Center, here’s how to do it:
Right click network in system tray and select Open Network and Sharing Center and click change adapter settings.
Right click on TAP adapter and click properties, select TCP/IPv4 or TCP/IPv6 depending on which you use and click properties again.
Click on advanced tab, uncheck Automatic and set Interface metric to 1.
Once you’ve done this click on ok, disconnect from DefenceVPN and reconnect to it and your connection speed problem should be fixed.
The lower the Interface metric number the higher its network adapter’s priority and if you have quite a few network adapters the problem can get quite bad.Share on Twitter