Hello Alex,   
      
   On Tuesday January 23 2018 15:48, you wrote to me:   
      
    AS>>> No, it's the default "prefer IPv4 over IPv6" in your system or   
    AS>>> browser settings.   
    MvdV>> Odd. Because this only happens when I use the RELAY6 method   
    MvdV>> when locally accessing my website. When I used the netsh   
    MvdV>> method, I always connected via IPv6. And wneh connected other   
    MvdV>> websites aroud the world, IPv6 is the preferred method.   
      
    AS> Then it's something with RELAY6 altering IPv6 default route priority.   
      
    MvdV>> Hmmm...   
      
   It loooks like it is something peculiar to Firefox. Apparently Firefox   
   remebers if a site ismore easley reacheable via IPv4 than via IPv6. It will   
   eventually adjust when a site goes from IPv4 only to dual stack, but it takes   
   a while.   
      
   So when I first start my web server and start relay6 some time later, Firefox   
   acceses it via IPv4. For a while...   
      
   The solution is to start relay6 /before/ starting the web server. Then Firefox   
   will see it as a dual stack web site and use IPv6 from the start...   
      
      
   Cheers, Michiel   
      
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    * Origin: he.net certified sage (2:280/5555)