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От : Michiel van der Vlist 2:280/5555 11 сен 26 10:59:08
К : Dmitry Protasoff 11 сен 26 12:46:01
Тема : FidoMail Mobile 0.1.1+78 - Windows and Linux builds, IPv6 dialling
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@CHRS: CP850 2
Hello Dmitry,
09 Sep 26 21:04, I wrote to you:
DP>> - Connections now try IPv6 first when your network and the node
DP>> both have it. Dart always dialled IPv4 first; now both families
DP>> are raced (RFC 8305) and the first to answer wins.
MV> The latter is a bit like "happy eyeballs" except that the latter gives
MV> IPv6 a small advantage by letting it win even if it is a tiny bit
MV> slower.
I am now running 0.1.2 which supports IPv6. I notice the following.
Selecting : "Auto" seems to boil down to "Prefers IPv4". Whenever I
try, it always connects to IPv4 with this setting. So it either IS
"prefer IPv4" or IPv4 always wins the race you describe. Without giving the
IPv6 a little headstart as in "Happy Eyeballs". As an IPv6 evangelist I
would prefer IPv6 to have a small advantage.
To make it connect via IPv6 I have to select "prefer IPv6". Then
it does indeed connect via IPv6. I have not yet been able to try
this setting in an IPv4 only network. Stay tuned...
I have tried to connect to an IPv6 only server. When I try to
connect to a server where the DNS only shows an AAAA record, there is no
connection. Not with "auto" and not with "prefer IPv6". "Mislukt, Netwerk
onbereikbaar" (Failed, network unreachable)
What I also have not tried yet is to connect to an IPv4 only
server from an IPv6 only netwwork. What happens? No connection? Or does it
try NAT64/DNS64?
Cheers, Michiel
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