[masraum]

Originally Posted by Lexus4321

not hard at all

get one of these
https://www.amazon.com/Linksys-5-Port-Gigabit-Ethernet-SE3005/dp/B00FHREBDI

plug the modem port, the router wan port, and your NVR into this switch. enjoy it working. yes, it's that simple.

That's ONLY going to work if he can get more than 1 IP which I'm not thinking is likely. And rather than buying another device, he could just plug the modem into one of the LAN ports of his current router and not use the WAN port and get basically the same thing. That would put all of the LAN ports on the same network and even the wifi stuff. The only difference would be that he'd need to disable the DHCP on the LAN side of the router.