FLIR 16 Channel NVR, Problems Communicating Through The Router To Cameras In Another Building

I had to use FLIR because the client has two other locations that have FLIR NVR's. The unit is a 16 channel with 8 POE ports for local cameras and has two NIC cards with only one port on the back for the Internet connection. Tech support sucks and will not support any devices outside of the NVR appliance.

There are two buildings on the property. Seven cameras go directly into the NVR/POE ports on the back of the NVR and are working fine and I have four cameras in the other building with a POE switch. From the POE switch in the remote building the NVR can see all four of those cameras but no video. I was told by tech to plug the gateway (actually there is no gateway in place right now), NVR and the Ethernet from the switch from the other building into the router at the head end and set up the DMZ. I did that and still cannot see the cameras from the other building at the head end.

The cameras are set to 10.1.1.___ and the gateway address is 10.0.0.___. I keep getting told that I have a subnet issue. The two subnets are 255.255.255.0. I've never set up a DMZ before and I'm not THAT well versed in networking, I'm used to having two having two Ethernet ports, one for the cameras and one for the gateway. I am thinking that the subnets need to be 10.0.0.0.

At this point there is no gateway going to the Internet so I am using a Linksys router with an address of 10.0.0.2 in anticipation of the gateway (probably Comcast) being 10.0.0.1.

If anyone can lead me in the right direction of my guess that the correct subnet to use on both NIC cards and how to set up the DMZ on the Linksys router. The DMZ seemed pretty straight forward but the first 3 octets are fixed so I put the MAC of the camera NIC into the setting instead.

Hopefully that is enough information for you guys. Thanks in advance!

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