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By chance I discovered that it's now also possible to set a AAAA record with DynDNS Free, yaiy! Great, now the domain points to both an IPv4 and IPv6 address. So far this works quite well and as expected and it's great that I can avoid all the ugly port forwarding for IPv6 and don't have to give people the lengthy IPv6 address anymore. I'm just having one issue: I'm losing the AAAA record after about a day and have to set the same IPv6 address again manually via the web interface. Is this a bug on the dyndns side or am I doing something wrong? Cheers, T_X
Answer by RotBlitz · Aug 03, 2011 at 08:58 PM
What does it mean, you lose it? Does the entry simply disappear from the field? As this is pretty new, this may still be a bug. To reproduce this, I have entered an IPv6 address as well. Let's see if I'll get the same observation.
it's great that I can avoid all the ugly port forwarding for IPv6
Really? Is your IPv6 connection directly to the internet passing through the router in bridged mode? Does your router support this at all? Most home/SMB routers don't. Or is this just an IPv6 tunnel, i.e. IPv6 over IPv4? The latter may work.
Yep, I can confirm that the IPv6 address disappears on my free account!
Will try the same with my paid account now. According to my findings, I may contact DynDNS support directly then.
It also happens with my Pro account. It seems that each time an IPv4 update takes place, the IPv6 address is removed from the hostname.
I have submitted a support ticket, reference [DynDNS #1549768].
Here's the response from DynDNS support:
This is intended behaviour. Since an update is being sent for the host without a V6 address, the system has no way of knowing if the V6 information needs to be kept, so it is discarded.
At present, V6 hosts should not have V4 updates sent for them.
What could be done about it next? (Do I need a non-free account on dyn.com for further steps?)
I do not believe a Pro account would help at all here. I have asked this as a Pro user and got the quoted response. You may try to use your one hostname for IPv4 and the other hostname for IPv6 (not sending updates for this), as of "At present, V6 hosts should not have V4 updates sent for them". Report back if this works. It should!
Answer by Cry Havok · Aug 09, 2011 at 05:48 AM
In summary of the [duplicate on the other forum]: - When an update clients sends an update with only an IPv4 address (which right now seems to be all the API supports) any existing IPv6 address is removed. The poster (T_X) has been advised to raise a bug report with DynDNS. : http://forum.dyndnscommunity.com/forum/viewtopic.php?f=17&t=3668
Answer by T_X · Aug 04, 2011 at 02:57 PM
Yes, under "Modify Hostname" -> "IP Address" -> "IPv6 Address (optional)" it simply disappears after about a day and after that it also disappears in "dig AAAA myhostname". Just happened again to me.
Really? Is your IPv6 connection directly to the internet passing through the router in bridged mode? Does your router support this at all? Most home/SMB routers don't. Or is this just an IPv6 tunnel, i.e. IPv6 over IPv4? The latter may work.It's a Linux router. So afaik, both things should be possible. However, yeah, I'm using a tunnel from sixxs.net and my router serves different prefixes, even subnets, via radvd. So, ehm, sorry, I'm not quite getting your response - when I'm having an IPv6 address on different hosts in my network, in which cases would I have to do port forwarding for IPv6 addresses? Anyways, I'm curious whether you'll see the same issue, thanks for checking :).