Here are my clarifications:
1. Everything, including mydlink, work fine when I only have 1 cam.
I don't have to change the default port for http / https / RSTP.
The UPnP port forwarding is disabled.
Only the UPnP presentation is enabled.
2. After adding an extra cam, only 1 cam works with mydlink.
The other cam will only connect with proxy mode, which will be disconnected every 5 mins.
3. Later, I changed all the ports mentioned above, with UPnP port forwarding enabled.
But nothing changed.
I had no camera with port 80 / 443 being configured.
But when I see the UPnP log, it will still connect to the 80 / 443 ports.
So, I wish to know:
1. Why are port 80 / 443 is still being used by UPnP?
2. Anyway to avoid the use of the port 80 / 443?
3. Anyway to allow connecting to mydlink without using proxy mode?
Thanks a lot.