DynDNS on the Fritz!Box: step-by-step setup
AVM's Fritz!Box has built-in DynDNS support. With DNS Beacon you can reach your router, NAS or home server under a permanent hostname — even when your provider changes your IP address. Here's how to set it up in a couple of minutes.
Step by step
- Open the admin interface of your Fritz!Box (AVM) and go to Internet → Permit Access → DynDNS.
- Enter the values below. Your username is your account email, your password is an API key from the dashboard.
- Save the settings. Your hostname now updates automatically whenever your IP changes — usually within a minute.
Settings to enter
Internet → Permit Access → DynDNS
- Provider:
- Custom
- Update URL:
- https://api.dnsbeacon.com/nic/update?hostname=<domain>&myip=<ipaddr>
- Domain name:
- myhouse.dnsfollowme.uk
- Username:
- your email address
- Password:
- your API key
- IPv6:
- Placeholder <ip6addr>. Dual stack: append &myipv6=<ip6addr> to the update URL. DS-Lite: send only ?hostname=<domain>&myipv6=<ip6addr>, without <ipaddr>.
IPv4 or IPv6?
The values above update the IPv4 address (A record) — the normal case on connections with their own public IPv4. For IPv6 (AAAA record) the device sends the parameter &myipv6=<IPv6> in addition or instead. How to do that on this device is in the "IPv6" row of the table.
DS-Lite or CGNAT (many cable and fibre connections): the router then has no public IPv4, and the service rejects a private WAN address with "abuse". In that case send only myipv6 — or use the DNS Beacon client directly on the target device, which detects both address families itself.
Need a free hostname first?
Create a free DNS Beacon account, add a hostname and generate an API key — then come back and finish the setup above.
Create free account