Subj : Re: List of IPv6 Fidonet nodes
To   : Michiel van der Vlist
From : Tony Langdon
Date : Thu Aug 25 2016 07:17:00

-=> Michiel van der Vlist wrote to Tony Langdon <=-

 MvV> Yes, that would cause a dalay.  But it is not the only way dalays can
 MvV> occur.

 TL> IPv4 hosts aren't affected.  They'll simply look up the A record and
 TL> make an IPv4 connection straight away.

 MvV> Properly set up IPv4 systems are not affected.

 MvV> But what also can happen is that the servers supports and advertises
 MvV> IPv6 and the client just /thinks/ it has IPv6 connectivity. 6to4 and
 MvV> Teredo tunnels are notorious for this. The client tries IPv6 first, but
 MvV> gets no connection because it does not have a working IPv6 connection.

Yes, that's correct.  I can reproduce that issue here too, if I replace my IPv6
copnnection with an IPv4 only one.  The hosts are statically configured, so
still have IPv6.  It has happened, but not as part of a normal setup (was a
workaround when the DSL line went down).

 MvV> Teredo is history, or at least it should be, Microsoft shut off their
 MvV> Teredo servers.

 MvV> 6to4 is still among us....

Yes, 6to4 is there, though not something I ever used myself.


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