I recently update the firmware of an NC450 camera from 1.2.4 to 1.5.6 , after which, it was no longer possible to access the device device management web page, the error being "ERR_SSL_VERSION_OR_CIPHER_MISMATCH" (Chrome).    Also, it was no longer possible to live view the camera view using the web portal as well.

It is very strange that the earlier version did not have this problem ... but then, it didn't use https back then, which hence did not require the security certificate to be recognised.

Apparently has to do with TLS 1.1 being deprecated, and most browsers refusing https web pages using self-signed certificates.  (old Internet Explorer has also been deprecated and not available on most devices to access device web portals).

I have managed to use Firefox browser to access it after setting the "security.tls.version.enable-deprecated" to "true" instead of default "false".

So my question to the folks is:

(1) browser - is there a permanent solution available that would allow most browsers (Chrome, Edge, Firefox, etc) to access the web management portals of TP-Link devices, including the NC450 ?

(2) NC450 firmware - is there any patch that TP-Link can do to at least solve this small problem?  users of these devices can at least still be able to manage these devices if needed.

(3) tpcamera mobile app issue - as a separate matter, when accessing the NC450 using the android mobile app while on the same WiFi (both camera and mobile device is on same wifi), the mobile app requests for the camera password, but it doesn't work.  The simple workaround is for the mobile app to be using a separate internet access, not the same wifi internet as the NC450 camera  (must be completely separate route, one home broadband with multi wireless access points will not do).  This suggests that the mobile app apparently tries to access the camera directly instead of via the cloud service.  This is also an odd bug, though the workaround is quite simple.

Thanks y'all.