So D-Link can't seem to reproduce the issue at hand here. Saw screen shots of remote access to cameras at home. Models 5020L and 5222Ls tested. Router tested is a DIR-890L that the cameras are connected to.
They walked me thru the Advanced Settings that can be accessed from the MDL site once you gain access.
It opened up the actual cameras web page UI.
So after looking at this. I decided to disable PF on the 933L camera and reboot it. I used IE11 so I already had other tabs open to other sites. I just closed the MDL tab then reopened an new tab. Logged in to MDL and selected the 933L. I could still access the camera and video. One more test step. I fully closed IE and cleared the cache. Reopened IE11 and logged into the MDL site. Selected the 933L camera and I could NOT access the camera.
I did stress to D-Link that the main issue is that users can't even get access to cameras once logged into the MDL site.
It was mentioned that there maybe an issue with uPnP found on routers which due to recent uPnP security issues found over the past couple of years, more stricter uPnP code was implemented on routers, at least with D-Link I presume. Unsure what other Mfrs have done. This new uPnP code maybe playing a role in how MDL and Cameras are interacting with there connected routers and it's uPnP code.
I'm currently using a older 865L router which were not sure if it's uPnP code was updated and I don't know if uPnP security issue even effected it. I did make note to D-Link that the last 3 newer model routers I have tested with did not work using default settings on the 933L camera which PF is disabled. I'll be putting back my DIR-980L this weekend and attempt to test the 933L again with PF disabled and enabled and check again from work next Monday to see what I find.
D-Link will have a look and see. Next FW release may help all of this, we hope. Please be patient. For now, if the PF enable helps fix this as a work around, then use it until next FW on the cameras.
Will post if I get any other information. All for now.