Network access/routing issue. The configuration that is place worked perfectly fine until the broadband ISP switch out their cable modem. See attached diagram for clarification.
The issue at had is before the cable modem gateway was replaced, any workstation on the local LAN (192.168.1.x) was able to access the DVR/NVR camera system using it's address of 10.1.10.101. However, now that address is pingable from the 192.168.1.x network, but no other network access works (ie. the NVR software can't connect to it). The NVR system is still accessible from offsite by using the public static ip of the ISP gateway which has port forwarding to the NVR device. In an ideal world, I would have had the camera system installed behind the network firewall so all devices were on the same ip network. So I am looking for some input on what might be going on here. Why would the old ISP gateway allow the communication but the new gateway appears to not. Is there something that we should communicate to the ISP to change in their gateway to fix this issue?
Any insight is appreciated.