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Forum Discussion
VenomBoiiii
Aug 20, 2020Aspirant
Port forwarding ports closed
I have all my portforwarding options set up and have been doublechecking and troubleshooting that everything is correct for the past several hours and whenever I use a port checker it says they are c...
CrimpOn
Aug 20, 2020Guru - Experienced User
VenomBoiiii wrote:I have all my portforwarding options set up and have been doublechecking and troubleshooting that everything is correct for the past several hours and whenever I use a port checker it says they are closed (both TCP and UDP).
When a port checker insists that ports are closed, it typically means one of two things:
- The computer that is supposed to be hosting those ports (the IP address that the ports forward to) does not have them open.
This is part of the computer firewall. The default setting is, "do not accept ANY connections". - The public IP address that the port checker is looking at is not the IP address of the Orbi router.
This usually happens when the Orbi is connected to an ISP device that is not "just a modem".
i.e. it is a combination modem/router. The common description of this is a "Double NAT":
https://kb.netgear.com/30186/What-is-Double-NAT
The quick way to check this is to open the Orbi web interface and click on the Advanced Tab.
The box "Internet Port" will show the WAN IP address of the Orbi. If it is a "private IP address", then there is work to be done.
https://en.wikipedia.org/wiki/Private_network
VenomBoiiii
Aug 20, 2020Aspirant
What do I do if it is private? Should I simply change the WAN IP to the same as my router's?
- FURRYe38Aug 20, 2020Guru - Experienced User
What is the Mfr and model# of the Internet Service Providers modem/ONT the NG router is connected too? If there is a built in router at the modem, 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=desktop
VenomBoiiii wrote:What do I do if it is private? Should I simply change the WAN IP to the same as my router's?
- CrimpOnAug 20, 2020Guru - Experienced User
VenomBoiiii wrote:What do I do if it is private? Should I simply change the WAN IP to the same as my router's?
First, does the Orbi WAN interface have (or not have) a "private" IP?
If it does, then FURRYe38 has explained the three alternatives. If it does not.........