KnowHow ► NAS & Storage Synology NAS: Locked Out After HTTPS Redirect – Step-by-Step Recovery No access to the Synology web interface after enabling the forced HTTPS redirect? This guide covers all recovery options – from the quickest workaround to the last resort.

The Problem

If you have locked yourself out by a misconfigured certificate while the HTTP-to-HTTPS redirect was already active, the Synology DiskStation web interface is no longer accessible via a browser. The browser reports a certificate error and offers no way to add an exception – other browsers behave the same way.

The good news: data remains accessible via network shares. And there are several ways to restore web interface access without having to reset the NAS.

Solution 1: Mobile Browser Workaround (Fastest Method)

In our case, accessing the web interface via a smartphone (Android) with the Dolphin browser worked without a certificate error. Other mobile browsers may also work.

1. On the smartphone, open the DiskStation web interface: http://[NAS-IP]:5000
2. Navigate to Control Panel in DSM.
3. Connectivity → Network → DSM Settings tab.
4. Uncheck: Automatically redirect HTTP connections to HTTPS.
5. Save – normal HTTP access is restored.

You can now create a new, valid certificate via HTTP and then re-enable the HTTPS redirect – but only once the certificate is working correctly.

Solution 2: Access Port 5001 Directly

DSM also listens on port 5001 for HTTPS by default. Sometimes the web interface can be reached via this port despite the certificate error, if the browser allows an exception:

https://[NAS-IP]:5001

Click "Advanced" → "Proceed anyway" in the browser (or the equivalent for your browser). Then disable the HTTPS redirect as described above.

Solution 3: Synology Assistant

The Synology Assistant tool (free download from synology.com) detects DiskStations on the local network independently of the browser and provides direct access to the management interface – even when HTTPS issues are present.

Solution 4: SSH Access (Advanced)

If SSH was previously enabled, the configuration can be changed directly on the command line:

1. Establish SSH connection: ssh admin@[NAS-IP]
2. Edit the DSM configuration file to disable the forced HTTPS redirect.
3. Restart DSM services: synoservicecfg --restart nginx

Solution 5: DSM Reset (Last Resort)

If all other methods fail, Synology offers a soft reset: this resets DSM settings but leaves the data on the hard drives intact. The reset button is located on the back or bottom of the DiskStation depending on the model.

DSM 7: Where Is the HTTPS Setting?

In DSM 7, the path has changed slightly:

Control Panel → Login Portal → DSM tab → uncheck "Automatically redirect HTTP connections to HTTPS".

Questions about Synology NAS? Our team is happy to help: sales@industry-electronics.com  |  Tel. +49 (0)7666 / 88499-0