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drjtech's avatar
drjtech
Follower
Oct 30, 2025

Problem with port forwarding not working on my CAX80 connected to Xfinity.

I was having the same problem with port forwarding not working on my CAX80 connected to Xfinity. After double and triple checking for errors on my part I checked the web for a solution and found your post.

 

Sure enough, after reverting to FW 2.1.5.2 port forwarding works, and Xfinity breaks it again overnight. It looks like nobody is interested in actually fixing the problem.

cax80

2 Replies

  • FURRYe38's avatar
    FURRYe38
    Guru - Experienced User
    Oct 30, 2025

    How is PF  configured on the gateway? 

    Is uPnP disabled on the gateway before setting any up any PF configurations. 

     

    After v5 FW is applied, have you performed a factory reset and setup from scratch to check this? 

     

    I'll pass this along to NG along with any and all troubleshooting details you have. 

     

  • StephenB's avatar
    StephenB
    Guru - Experienced User
    Oct 30, 2025
    drjtech wrote:

    after reverting to FW 2.1.5.2 port forwarding works, and Xfinity breaks it again overnight

    What port are you forwarding?