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Forum Discussion
jconradh
Aug 20, 2025Tutor
CAX80 Firmware Version 5.1.1.8 Stops ALL port forwarding
Xfinity keeps updating my CAX80 firmware to 5.1.1.8, and it destroys all port forwarding ability. This is AFTER a full reset multiple times. I have to re-flash to the 2.1.5.2 firmware and port forwar...
CrimpOn
Aug 20, 2025Guru - Experienced User
How do you know that Xfinity is updating the firmware rather than Netgear?
Some Netgear routers have a setting to control automatic firmware updates. Guessing that the CAX80 does not?
If the router is updating itself by checking in with Netgear's update servers, one method is to block access to those servers:
- Create an account with OpenDNS.
- Set the CAX80 to use OpenDNS to resolve URLs (208.67.222.222 and 208.67.220.220)
- Set the OpenDNS account to block access to:
update.netgear.com, updates.netgear.com, updates1.netgear.com, updates2.netgear.com, updates3.netgear.com, http.fw.updates1.netgear.com
Firmware v.5.1.1.8 was released in August, 2024.
jconradh wrote:Others seem to have the same issues
If you have links to other discussions about port forwarding and the CAX80, maybe one of the Forum moderators can refer the issue to Netgear support.
- jconradhAug 20, 2025Tutor
I did as you asked. I will let you know if it works.
It's a shame I cannot just block it on the CAX80 modem/router.