Remote backup NAS can't connect to local NAS

[Enquiries]

Hi. I enjoy your YouTube channel very much, and based on your advice on the channel, I bought two QNAP NASes. I bought a TS-453D, and later a TVS-h674. I put the TS-453D in a remote location and installed the upgraded TVS-h674 into my home office. I also have two TR-004 extension NASes on each NAS.

I put much of my archived material from years before on the connected TR-004 NASes. They were plugged into an old UPS. Unfortunately, the old UPS didn't work properly and suddenly cut electricity to the TR-004 extension NASes.

Fortunately, the main TVS-h674 was plugged into a more robust UPS, so the electricity didn't cut on that one suddenly. Also, fortunately, I have a full backup of my archived material on the backup 453. However, QNAP's HYbrid Backup Sync cannot connect the backup NAS to the remote NAS. QNAP's technical support people remotely connected to both my NASes. They said that the problem was that port 8899 wasn't open on my local network. I opened the port, but nothing.

[ed]

Thanks for the support, and I'm glad you’ve been finding the channel helpful! It sounds like you’ve got a solid setup with the TS-453D and TVS-h674, and the TR-004 extensions as well.

Regarding the connection issue with Hybrid Backup Sync (HBS) between your remote and local NAS, here are a few troubleshooting steps to try since you’ve already opened port 8899 and still have no luck:

Check Port Forwarding: Double-check the port forwarding on your router, not just for port 8899 but also for any other ports used by HBS. Sometimes, additional QNAP services require open ports, especially if you’re syncing over the internet.

Enable VPN for Secure Connection: If possible, set up a VPN between your two NAS locations. Using QNAP’s QVPN service, you could establish a more reliable and secure connection, bypassing some firewall restrictions that might be causing connection problems.

Firewall and Security Rules: Both NAS units have their own firewall settings. Ensure that the firewall rules on each NAS allow connections from the remote IP of the other device. Go into the Security settings in QTS and verify that each NAS can access the other’s IP address range.

Reset HBS Configurations: Try deleting and reconfiguring the HBS backup job. Sometimes resetting the connection in HBS clears issues related to previous configurations or firewall blocks.

ISP-Related Restrictions: Lastly, some ISPs block or limit certain traffic types. Confirm that both locations have open internet access for the port range needed by HBS. You might also check if your ISP offers a dedicated static IP for each NAS location, as dynamic IPs can complicate consistent remote connections.

Maybe try Tailscale VPN.