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Brad McAfee

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Security DVR Not Accessable Inside Network

We have a FLIR DVR home security system in a home with AT&T UVerse with one of their own modems.

We have set up port forwarding and installed the FLIR app on the phone, which works flawlessly.  It is set to access the system to the public/WAN IP address.

However, we have one problem.  When you try to access the app from inside the network (where the FLIR DVR is located) it does not work.  However, when you turn off the WiFi on the phone and allow it to use the mobile network, it works.

I am sure I am missing some fundamental network principle here on why it is not working (and any thoughts on how to resolve it)?
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bbao
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basically it just means the server name or IP address used by the mobile app is pointed to the public IP address of your router, therefore this IP address is not access when the mobile device is on the internal network.
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Brad McAfee

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@bbao I understand that but why can the phone app (simply put) not go out to the Internet and come back into the router making a big U shape traffic pattern?
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> not go out to the Internet and come back into the router making a big U shape traffic pattern?

it depends on the router's settings on WAN port. some routers do not allow this kind U turn traffic.