Verizon 5g/LTE as backup not working

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GKarasik

• June 22, 2026 20:27
• Edited

Hi,

I'm hoping for some trouble-shooting suggestions. I've signed up for Verizon Internet as a backup to my ATT fiber. My Gold Plus sees the Verizon router, an ASK-NCM1100 in IP Passthrough mode, and the Gold Plus sees both an external and gateway IP. I can connect through the Gold Plus to the Verizon router's GUI over its gateway IP. The Gold Plus is set up in Failover mode, Auto Fallback On. When connected to my iPhone, the NCM1100's wifi works (I have internet access) .

What I don't have is internet access when I set the Verizon router as the Active connection. It seems like the Gold Plus isn't passing the Verizon router's internet access to my network. I have experimented with various DNS settings on the Verizon router (the Gold Plus's DNS, Verizon's DNS, 8.8.8.8, all with no joy.

Does anyone have any suggestions?

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  Firewalla

  • June 22, 2026 20:29

  Does your "Verizon" WAN port get IP from the modem? Is it a private IP? Does the that IP overlap with any of your WAN or LAN existing IP? (make sure they are not)

  Try to ping 1.1.1.1 or 8.8.8.8 and see if you can get through the Verizon side. 

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  FirewallaSupportDesk

  • June 23, 2026 00:17

  GKarasik I hide your reply, because it contains a public IP. We don't recommend expose it on the Internet. 
  
  If your device can ping 1.1.1.1 or 8.8.8.8 while Verizon is the active WAN, Verizon's connectivity should be fine. You can run a trace route test to confirm if the traffic is truly outbounded via Verizon. 
  
  On Firewalla WAN Interface, could you change the DNS server to 1.1.1.1 and 8.8.8.8 as a test?

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  GKarasik

  • June 23, 2026 00:42
  • Edited

  Thanks. I forgot the address would be visible in the screen shot. I had already changed the DNS to 1.1.1.1. With that setting I can access/download email, but there's no web-surfing. "Run Network Diagnostics" shows everything successful and connected.

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  FirewallaSupportDesk

  • June 23, 2026 02:06

  See if Turn on Emergency Access on a device makes any differences. 

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  GKarasik

  • June 23, 2026 02:34

  Doesn't help.

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  FirewallaSupportDesk

  • June 23, 2026 09:20

  Ok, at least we know it's likely not Firewalla features are causing issue. What if you directly cable a device to your Verizon router when it's in IP passthrough, is it able to browse Internet?

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  GKarasik

  • June 23, 2026 14:01

  Neither wired nor wireless.

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  Firewalla

  • June 23, 2026 16:09

  If you can't browser internet using a direct connection, likely something is wrong with verizon IP passthrough mode. If you turn back to router mode, does it work?

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  GKarasik

  • June 23, 2026 16:22

  No. Same result. Email works but can't browse. I think it's a DNS mis-configuration in the router's IP -Passthrough. I'll get with Verizon. Many thanks for your time.

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