Hello,
I am using a Fritz!Box 3270 (from the German company AVM) to establish an IPv6 Tunnel with HE.
My IPv4 Internet connection uses dynamic IP addresses.
The Fritz!Box router can be configured to use "configurable" dynDNS services.
A URL "ipv4.tunnelbroker.net/ipv4_end.php?ipv4b=<ipaddr>&pass=<pass>&user_id=<username>&tunnel_id=123456"
works just fine.
My IPv6 connectivity works just fine.
BUT: The router wants to be really too smart. The dynDNS config _requires_ a hostname to be configured.
The router checks (after some seconds ?) if that hostname has been updated with the new IP address.
As I am not really using a real dynDNS Service, I entered a hostname from a webserver (that has a static IP).
As a result the router logs errors like (sorry, German):
Dynamic DNS-Fehler: Die Dynamic DNS-Aktualisierung war erfolgreich, anschließend trat jedoch ein Fehler bei der DNS-Auflösung auf.
Dynamic DNS-Fehler: Der angegebene Domainname kann trotz erfolgreicher Aktualisierung nicht aufgelöst werden.
translated: DNS update did work, but an error was detected in the DNS name resolution.
translated: The provided domainname could not be resolved to the dynamic IP address.
Those logs would be OK, but as a result the router also _retries_ the dynDNS update every 4 (and some more) minutes.
I opened a ticket at AVM asking them to provide some kind of "advanced config option: don't check DNS A records".
But maybe HE could also extend their service by providing a hostname that will be updated with the dynamic IP of the
tunnel endpoint. There seems to be already an AAAA record for USERNAME-2-pt.tunnel.tserv26.ber1.ipv6.he.net for
example. Maybe there is this kind of hostname and I just didn't find it mentioned somewhere.
Ralf Moritz