Solved: problems with IP Cams (Foscam, etc) after switching from cable co-ax internet to fiber internet
Prior to the switch, on the old cable internet, the Foscam cameras (FI8910W / C1s, etc) would come up reliably and consistently outside the home network, on Verizon / ATT / Sprint LTE phones.
After the switch, the Foscam cameras may come up sporadically outside the wifi network, but come up consistently and rapidly on the home network.
Cellular signal is perfect (4-5 full LTE bars), nothing else has changed.
The switch to gigablast changed the pipe and they moved to a new AC router, but I helped them configure the DDNS / port forwarding exactly like before, along with fixed internal IP addresses for the cameras.
Can anyone think of what may cause this strange behavior? Cox swears they're not limiting or throttling the gigabast internet in any way.
So the IP cameras should be coming up lightning fast on Verizon / ATT / Sprint LTE networks, instead of acting like dial-up or sometimes not coming up at all.
QoS is turned off, just to make sure router is not de-prioritizing traffic... I'm stumped...
EDIT: Solved - netgear router was the problem.