Inbound 80 and 8000 is sometimes blocked by ISPs. Test with some odd random ports.
Sorry but ISPs do make a mess of this stuff.
So I install surveillance video systems for commercial and residential applications. I recently noticed two customers having this issue with an xfinity modem/router. Two different model routers which I dont have at this time. The issue is as follows:
I use a DDNS client for the DVR/NVR due to dynamic IP addresses. I open up ports 80 and 8000 so it can be accessed remotely. I can access the systems remotely with no issues when I am not attached to the wireless router on the same network the DVR/NVR is attached to. When I am on the network, I cannot access the DVR/NVR when I am going through the DDNS website. If I use the IP address assigned by the router (i.e 10.0.0.4) it works, but for some reason the router is blocking the DDNS website when I am on that network. I disabled the firewall and still had this issues. Comcast of course is no help on the phone and is blaming the DVR/NVR. I pretty confidant there is a setting on the router that is causing this issue.
Was wondering if anyone knows
Thanks in advance