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Internet Port IP Address not matching real Internet IP Address
Hello, I'm currently trying to solve a port forwarding issue with my Netgear Orbi (RBR750 is the reported model) and I've stumbled upon something weird: When I go into Internet Port settings, i...
Your ISP appears to deploy CGN, Carrier Grade NAT (RFC6598: IANA-Reserved IPv4 Prefix for Shared Address Space) to overcome the shortage of public IPv4 addresses.
The NBN does only make up the transport layer, anything above is under the ISP responsibility.
Talk to your ISP, requesting a public routeable IPv4 address on your connection.
Regards,
-Kurt
Thanks so much for a speedy reply. I will check it out. Could this be the root of all my port forwarding issues as well?
Yes, of course. We have no control about the port forwarding on the ISP' CGN routers.
PS. Great explanation of the "is-situation" of your connection - made it easy to anser!
As a concluding note: Yes, this was the issue. And for 6 months, I've thought about throwing out my (brand new) Orbi routers because I couldn't get port forwarding to work.
Thanks for the assistance - saved me quite a bit of money. Was able to opt out of the CGNAT by giving my valid reasons for needing a real IP address :)
Your ISP Modem already has a built in router and wifi. This would be a double NAT (two router) 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=desktopTry option #2 if you want to help with a double NAT condtion...
Sempytender wrote:
Was able to opt out of the CGNAT by giving my valid reasons for needing a real IP address :)
Cool. For reference, which ISP, and any price tag attached to the service?
FURRYe38 wrote:
Your ISP Modem already has a built in router and wifi.
Nope. The IP address does talk a clear language - it's CGNAT.
