bull5 wrote: ↑20 Oct 2026, 17:30
Regarding the issue where the WebGUI was inaccessible after the update, if this problem occurs again, please generate and send a system report (via TOS Desktop > Support & Help > Issue Report) to our technical support team at support(at)terra-master.com.
Regarding WebDAV access via DDNS not working, please check the following:
1. Test local WebDAV access first:
- Try connecting via WebDAV locally using the NAS internal IP (e.g., http(s)://<NAS_IP>:<internal_port>).
- If local access works, the WebDAV service itself is functioning normally, and the issue lies in port forwarding, protocol mismatch, or DDNS resolution.
2. Check port mapping and protocol in TOS:
- Go to Control Panel > File Services > WebDAV and verify the assigned port for HTTP or HTTPS.
- Ensure external port 474 on your router is correctly forwarded to that exact internal WebDAV port on the NAS IP.
- Make sure the connection URL used in your WebDAV client specifies the correct protocol (http:// vs https://) matching port 474.
3. Check DDNS and Public IP:
Verify that your DDNS domain resolves to your router's current public WAN IP, and ensure your ISP provides a public IP rather than a CGNAT address.
Please let us know the results of the local test so we can assist you further!
To contact our team, please send email to following addresses, remember to replace (at) with @
Technical team: support(at)terra-master.com(for technical support)
Service team: service(at)terra-master.com(for purchasing, return, replacement, RMA service)