Dear TP-Link Support Team,

I'm writing to report an ongoing issue with my Tapo C100 camera (hardware version: EU2.0). The camera consistently displays the message: "This device can only be controlled locally." As a result, I'm unable to access it remotely via the Tapo app when outside my home network.

I've already followed all troubleshooting steps suggested in your community thread (Topic 230044), including:

- Updating the Tapo app to the latest version.
- Ensuring the camera firmware is up to date (though remote updates are impossible in this state).
- Rebooting the camera multiple times.
- Performing a full factory reset and reconfiguring the device from scratch.
- Testing the camera on a different Wi-Fi network (including using my phone's hotspot), where remote access worked correctly - confirming the camera itself is functional.
- Attempting to adjust DNS settings to 8.8.8.8 on my home router (where possible).
- Temporarily disabling router firewall and access control features (where administratively allowed).

Unfortunately, none of these steps resolved the issue on my primary home network. The problem appears to be network-related, but I cannot make deep router changes (e.g., port forwarding, firewall rules) as the router is managed by my ISP.

Notably:

- My Tapo C100 works perfectly within the local network.
- Other smart devices (including another Tapo product, the Tapo C210 camera) function normally on the same network (accessible remotely via the Tapo app when outside my home network).
- A different brand of IP camera works remotely on the same network without issues.

I suspect this may be related to how the Tapo C100 communicates with TP-Link cloud servers under certain network configurations - possibly involving UPnP, NAT traversal, or TLS/SSL inspection performed by the ISP's gateway.

I have the diagnose_log file. How can I share it with you?

Thank you for your attention and support. I look forward to your guidance.