Prefer IPv6 over IPv4 by default

Hello team and @angristan ,

I have a Ubuntu 20.04 VPS on AWS Lightsail and I installed wireguard. IPv6 is supported and I can ping IPv6 address. When I access some websites like google.com or youtube.com, IPv4 is preferred by default and I have to pass capthca screen sometimes for security reasons. Some shared public IPv4 address on cloud are blacklisted or suspicious because they are used too much on the cloud.

To overcome this issue I would like to use IPv6 by default and IPv4 as a fallback.

You can see the test results on https://ipv6-test.com/

Thanks

Wireguard is working

Wireguard is not working