Set up DynDNS on Ubiquiti UniFi
Keep a fixed hostname on your UniFi gateway — configured in minutes in the Network application.
UniFi OS gateways (Dream Machine, UXG, USG) include a Dynamic DNS client based on inadyn. With the “dyndns”/custom service and the dremaxx server string your gateway updates your hostname on every WAN IP change.
Every DynDNS domain comes with its own username (the hostname itself) and a generated router password. You find both in the dremaxx console:
- Sign up for free and create a DynDNS domain — e.g. myhome.dxdns.de under a shared system domain, or under your own domain.
- Open the domain in the console — the “Router credentials” card shows username, password and the update URL.
- Enter those values below in place of the example hostname.
Values to enter
UniFi Network: Settings › Internet › WAN › Dynamic DNS › Create New.
myhome.dxdns.de is an example — replace it with your own DynDNS domain from the console.
Set it up
In the UniFi Network application go to Settings › Internet, select your WAN and scroll to “Dynamic DNS”.
Click “Create New” and choose the service “dyndns” (or “custom”, depending on your firmware version).
Hostname and username are your full DynDNS domain; the password is the router password from the console.
Paste the server value exactly as shown above — UniFi replaces %h with the hostname and %i with the current WAN IP.
Save the entry. UniFi sends the first update immediately; the update history in the dremaxx console shows it live.
IPv6 / dual-stack notes
Verify it works
After saving, your device sends its first update within seconds to a few minutes. Open the domain in the dremaxx console — the update history shows every request live, including the reported IPv4/IPv6 and its status. Alternatively, resolve your hostname (e.g. with our DNS lookup tool or dig) and compare it with your current public IP.
Note: one update per minute and address family is accepted per hostname. Identical re-announcements are answered with “nochg” — that is normal and not an error.
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