Beginning to think this might be a firewall / security configuration issue. The 1080p cams are operating wirelessly (for the moment); all have static IP addresses and are on an inside network segment.
I fully expected the Amcrest Pro View application on iPhone to communicate with the devices (which it does) when the phone was connected to my Wi-Fi router on the same interior segment. What I did NOT expect was opening the application while away from home - connected only to T-Mobile carrier network - and seeing my devices fully operational and streaming to my phone when I thought I was unconnected! I had assumed that I'd need to VPN into my network to connect to the interior segment, at which time it would have the same LAN access as if I were on my home Wi-Fi. That must mean my cams are broadcasting to an intermediate (Amcrest streaming complex, or other infrastructure). This is convenient, but not necessarily what I wanted. I want the streams to be only accessible to my network! How do I do accomplish this?
I could see if the DNS lookup for SMTP host name (handled by DNS servers outside my firewall) is routed through same interface cam is streaming to internet. The lookup would essentially be traversing and reentering the firewall, which is prohibited. Note that all the other devices on my network (mobile phones, Televisions, laptops, servers) have NO trouble originating SMTP with the same parameters that cams are configured with .
Please help if you can; thanks!
