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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