Subj : IPv6
To   : Ozz Nixon
From : Michiel van der Vlist
Date : Wed Mar 27 2019 10:10 am

Hello Ozz,

On Tuesday March 26 2019 18:48, you wrote to me:

ON> I updated my AAAA records for exchangeBBS... but, I do not have an
ON> IPv6 enabled VPS environment...

<sigh>  That's mounting the horse behind the cart. :(

D:\FIDO6\BINKD>ping exchangebbs.com

Ping exchangebbs.com [2001:470:1f18:12d::2] mit 32 Bytes Daten:

Zeitüberschreitung der Anforderung.
Zeitüberschreitung der Anforderung.
Zeitüberschreitung der Anforderung.
Zeitüberschreitung der Anforderung.

Ping-Statistik für 2001:470:1f18:12d::2:
   Pakete: Gesendet = 4, Empfangen = 0, Verloren = 4 (100% Verlust),


Advertising IPv6 connectivity when you do not actually have it, is BAD.
Properly configured clients will first try IPv6 and if that does not result in
a connect, they will try IPv4 after some time. For binkp connects this is just
mildly annoying, the Fidonet robots are very patient. But humans are not. Your
BBS users will get very annoyed having to wait for the fall back to IPv4.

D:\FIDO\NODELIST>ping 2001:470:1f18:12d::1

Ping wird ausgeführt für 2001:470:1f18:12d::1 mit 32 Bytes Daten:

Antwort von 2001:470:1f18:12d::1: Zeit=146ms
Antwort von 2001:470:1f18:12d::1: Zeit=142ms
Antwort von 2001:470:1f18:12d::1: Zeit=140ms
Antwort von 2001:470:1f18:12d::1: Zeit=139ms

Ping-Statistik für 2001:470:1f18:12d::1:
   Pakete: Gesendet = 4, Empfangen = 4, Verloren = 0 (0% Verlust),
Ca. Zeitangaben in Millisek.:
   Minimum = 139ms, Maximum = 146ms, Mittelwert = 141ms

The tunnel starting point pings, you tunnel end point does not. The tunnel is
not properly configured.


Cheers, Michiel

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