Websites like ipv6-test.com and test-ipv6.com say that my browser is using IPv4 by default.

This happens on Firefox and LibreWolf. I have tried creating a new profile without add-ons as well. Ungoogled Chromium uses IPv6 by default. If I go to ifconfig.io using Firefox, IPv4 is displayed. But if I use Ungoogled Chromium, IPv6 is displayed.

Is there a way to force IPv6?

I am not bothered by this, but using tools like ping6 and traceroute6 assures me that IPv6 routing is faster for, at least, one of my ISPs.

  • usernamesAreTricky@lemmy.ml
    9·
    1 year ago

    First check if you have ipv6 disabled in Firefox. I think there was a DNS issue on some lemmy instance a while ago where people were turning ipv6 off to work around that (was later fixed) or maybe I am misremembering where that was

    Go to about:config then make sure that network.dns.disableIPv6 is false.

      • usernamesAreTricky@lemmy.ml
        3·
        1 year ago

        Hmm, maybe this could be a DNS issue. Are you using DNS over HTTPS on Firefox (check on about:preferences#privacy? If so, what do you have the DNS provider set as?

        Also what happens if you go to a website that is ipv6 only such as https://ip6only.me/? Does it fail to connect or does it then actually use ipv6?

  • Atemu@lemmy.ml
    5·
    1 year ago

    I cannot reproduce that issue. Either site says IPv6 is working fine.

    FF 121 on macOS.

    • nutbutter@discuss.tchncs.deOP
      5·
      1 year ago

      Pinging my server in Frankfurt, DE, from my home in India, the ping speed using IPv4 is ~300ms, and using IPv6 is ~270ms.