[Edit: I have now found a solution; see below for my answer]
I want to set up dynamic DNS on my Fritz!Box 7490, so that it is reachable both on IPv4 and IPv6. Note that I want to reach the Fritz!Box itself, and not a computer behind it.
The scenario is that I have both native IPv4 and native IPv6 as dual stack, and both IPv4 and IPv6 are dynamically assigned by my ISP.
I am currently using freedns.afraid.org but would be open for other services as well if what I want can be achieved.
The issue I am facing is that the Fritz!Box GUI only allows for one update URL. In that update URL, I can use one of these three options:
- Automatic IP address detection (which uses IPv4): http:⁄⁄freedns.afraid.org⁄dynamic⁄update.php?MY-SECRET-TOKEN
- Pass IPv4 address to freedns.afraid.org: http:⁄⁄freedns.afraid.org⁄dynamic⁄update.php?MY-SECRET-TOKEN&address=<ipaddr>
- Pass IPv6 address to freedns.afraid.org: http:⁄⁄freedns.afraid.org⁄dynamic⁄update.php?MY-SECRET-TOKEN&address=<ip6addr>
However, what I would need is a link that updates both the IPv4 and the IPv6 address at the same time.
I have seen Dynamic DNS at freedns.afraid.org using a Fritz!Box - this helped as it showed me the <ip6addr> tag, but the person asking the question only wanted to update the IPv6 address, so it is not applicable to me.