DynDNS setup guide

Set up DynDNS on pfSense

Your pfSense firewall keeps your hostname pointed at the WAN IP — with full control per interface.

pfSense ships a Dynamic DNS client with a “Custom” service type that fits the dremaxx dyndns2 endpoint. One entry per address family gives you clean dual-stack updates.

Before you start: get your DynDNS credentials

Every DynDNS domain comes with its own username (the hostname itself) and a generated router password. You find both in the dremaxx console:

  1. Sign up for free and create a DynDNS domain — e.g. myhome.dxdns.de under a shared system domain, or under your own domain.
  2. Open the domain in the console — the “Router credentials” card shows username, password and the update URL.
  3. Enter those values below in place of the example hostname.
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Settings

Values to enter

pfSense UI: Services › Dynamic DNS › Add, Service Type “Custom”, Interface “WAN”.

Service / providerCustom
Update URL (custom)https://www.dremaxx.de/api/dyn-dns/nic/update?hostname=myhome.dxdns.de&myip=%IP%
Usernamemyhome.dxdns.de
Password:The router password of your domain (from the console)

myhome.dxdns.de is an example — replace it with your own DynDNS domain from the console.

Step by step

Set it up

1
Add a Dynamic DNS entry

Go to Services › Dynamic DNS and click “Add”. Choose Service Type “Custom” and your WAN as “Interface to monitor”.

2
Enter username and password

Username is your full DynDNS hostname, the password is the router password from the console.

3
Enter the update URL

Paste the update URL shown above into “Update URL” — pfSense replaces %IP% with the current WAN address. Set “Result Match” to “good” (optional, one value per line: good, nochg).

4
Save and force an update

Save the entry — pfSense performs the first update immediately. The status column shows the cached IP in green when it succeeded.

Dual stack

IPv6 / dual-stack notes

For IPv6 add a second entry with the same custom URL and pick your IPv6 WAN interface — pfSense then fills %IP% with the IPv6 address and updates the AAAA record.
Check

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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