DynDNS setup guide

Set up DynDNS on Synology DSM

Reach your NAS from anywhere — DSM’s built-in DDNS client updates your hostname on every IP change.

Synology DSM lets you define a custom DDNS provider with a query URL. Add dremaxx once via “Customize” and every diskstation in your network can update its own hostname.

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

DSM: Control Panel › External Access › DDNS › Add, service provider “Customize”.

Service / providerCustomize
Update URL (custom)https://www.dremaxx.de/api/dyn-dns/nic/update?hostname=__HOSTNAME__&myip=__MYIP__
Hostnamemyhome.dxdns.de
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
Create the custom provider

In DSM open Control Panel › External Access › DDNS, click “Add” and choose “Customize” as the service provider.

2
Enter the query URL

Paste the update URL shown above — DSM replaces __HOSTNAME__ and __MYIP__ automatically on every update.

3
Enter hostname, username and password

Hostname and username are your full DynDNS domain; the password is the router password from the console.

4
Test the connection and save

Click “Test Connection” — DSM should report “Normal”. Save the entry; DSM re-sends the IP on every change and periodically.

Dual stack

IPv6 / dual-stack notes

Synology’s “Customize” provider sends only IPv4 in __MYIP__. If you need an AAAA record, run ddclient or inadyn on the NAS (e.g. in a container) instead.
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.

Ready to reach home from anywhere?

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