2G WiFi No Internet Connection

Question

I have a Netgear R8500 router connected to an XFinity Modem (configured in Bridge Mode). My 5G Wifi Internet is working without issue. However, my 2G WiFi shows No Internet Connection when used (e.g. my iPhone shows "No Inernet Connection").

I've rebooted the Router and forgotten my 2G connections with no luck.

Wireless Network (2.4GHz b/g/n)
Enable SSID Broadcast
Name (SSID): WiFi-2g
Channel: Auto
Mode: up to 1000 Mbps

WPA2-PSK [AES] is selected.

FURRYe38 · Answer

What Firmware version is currently loaded?What is the Mfr and model# of the Internet Service Providers modem/ONT the NG router is connected too?
&nbsp;
Has a power off for 1 minute then back ON with the ISP modem and router been performed since last update?Be sure to restart your network in this sequence:Turn off and unplug modem.Turn off router and computers.Plug in and turn on modem. Wait 2 minutes for it to connect.Turn on the router and wait 2 minutes for it to connect.Turn on computers and rest of network.
&nbsp;
Last resort would be a factory reset.&nbsp;

Retired_Member · Answer

The XFinity Modem information is as follows:

System Software Version

eMTA & DOCSIS Software Version: Prod_20.2_d31 & Prod_20.2

Software Image Name: CGM4331COM_4.11p7s1_PROD_sey

Advanced Services: CGM4331COM

Packet Cable: 2.0

FURRYe38 · Answer

This modem already has a built in router and wifi. This would be a double NAT condition which isn't recommended. https://kb.netgear.com/30186/What-is-Double-NAT
https://kb.netgear.com/30187/How-to-fix-issues-with-Double-NAT
Couple of options,
1. Configure the modem for transparent bridge or modem only mode. Then use the NG router in router mode. You'll need to contact the ISP for help and information in regards to the modem being bridged correctly.
2. If you can't bridge the modem, disable ALL wifi radios on the modem, configure the modems DMZ/ExposedHost or IP Pass-Through for the IP address the NG router gets from the modem. https://kb.netgear.com/25891/DMZ-on-NETGEAR-routers
https://kb.netgear.com/24086/How-do-I-set-up-a-default-DMZ-server-on-my-Nighthawk-router
3. Or disable all wifi radios on the modem and connect the NG router to the modem, LAN to LAN configure AP mode on the NG router.

Retired_Member · Answer

The XFinity router is configured in Bridge Mode.

FURRYe38 · Answer

What Firmware version is currently loaded on the NG router?
&nbsp;
Has a power off for 1 minute then back ON with the ISP modem and router been performed since last update?Be sure to restart your network in this sequence:Turn off and unplug modem.Turn off router and computers.Plug in and turn on modem. Wait 2 minutes for it to connect.Turn on the router and wait 2 minutes for it to connect.Turn on computers and rest of network.
&nbsp;
Last resort would be a factory reset.&nbsp;

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2G WiFi No Internet Connection

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