Please Help-No access-websites not loading (404 messages)-Orbi RBR20-Mac OS and iOS

What Firmware is currently loaded?
What is the Mfr and model# of the ISP modem the NG router is connected too?
Is the Orbi system operating in Router or AP mode?

Modem Combo Units:
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 Orbi 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 Orbi router gets from the modem. Then you can use the Orbi router in Router mode.
3. Or disable all wifi radios on the modem and connect the Orbi router to the modem, configure AP mode on the Orbi router. https://kb.netgear.com/31218/How-do-I-configure-my-Orbi-router-to-act-as-an-access-point and https://www.youtube.com/watch?v=H7LOcJ8GdDo&app=desktop

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iabd wrote:

Hi Community—I've been encountering a lot of error messages and hoping someone can help.

I run Mac OS 10.14.5 (Mohave) and iOS 12.4 on iPhone Xr. Orbi is connected  via CAT 6 to an (wifi disabled) Arris modem supplied by Spectrum. I get 404 messages repeatedly, but not consistently. Orbi app denies access, says login incorrect. Have reset password 2X. No avail. Try downloading firmware updates, get 404 message. No access to orbilogin.com. I'm blocked at every turn.

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