Open portal for cellular range extender

Hello,

I have a Samsung 3g cellular network extender from Verizon that I need in my home since my cell reception is terrible. It’s worked in the past on a previous Netgear product, however I recently upgraded to the r6400 Nighthawk and I can’t get the extender to get a signal. The cellular extender is hard lined from the WiFi router’s Port 1 out.

I followed the instructions online from Verizon and even spoke to Netgear to help me walk through it all. Still not working.

I’ve included the instructions below and I’m curious if anyone has gone through this before and could help me out? I’ve selected to turn VPN on. I put all the correct codes in the Port Forwarding section of the advanced settings and I’m using the correct IP address assigned to the device. Not sure what I’m missing.

Thanks - Scott

Verizon Instructions:
Here's how to configure your router:
Make sure your IPSec (VPN) passthrough is enabled or supported. Visit Netgear's Knowledge Base page on VPN documentation to learn more.

Verify your Quality of Service (QoS) is enabled or supported. Visit Netgear's Knowledge Base page on QoS to learn how to enable it.

Make sure the following ports are enabled:
123 UDP
4500 UDP
500 UDP
53 TCP / UDP
52428 TCP / UDP
Visit Netgear's Knowledge Base page on port forwarding to learn more.

Note: You may need to know the IP Address assigned to the Network Extender by your router in order to forward ports. This can be found by going into your router's DHCP settings and finding the IP Address that is assigned to the Network Extender's MAC ID# / Address. The Network Extender's MAC ID is found on a sticker under the unit. For a 4G Network Extender, the IP Address can also be found by pressing the display button until it is displayed on the screen.