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onlize's avatar
onlize
Aspirant
Aug 16, 2022
Solved

Port forwarding stopped working on RBR750

Hello, I have an Orbi RBR750 with the latest firmware V4.6.5.14_2.0.54.

 

Hi, I have a problem with port forwarding. It used to work but stopped working. I did not change anything, and I am not sure why this happened.

 

I have two internal servers with different ports that I have to be able to access from outside of my network. I have two forwarding rules configured, but I cannot reach either one of my servers anymore. Can you help me with this?

 

Thank you.

9 Replies

  • Port forwarding typically relies on two concepts:

    • Dynamic DNS.  Because most customers are assigned IP addresses that may be changed by the ISP (without notice) at any time, it is customary to use a DDNS service to set up an internet name that will automatically update to the new IP address.  Orbi supports only a couple of DDNS services (noip.com, dyn.com).  If somehow the DDNS service is no longer correct, then they will not map correctly.
    • Hosts being open to accept connections.

    How about double-checking:

    • That the ports are open to the internet by using one of the common testing web sites, such as https://www.grc.com/shieldsup 
    • Also verify that the public IP address reported by the web test matches what the IP address that is current in the DDNS service.
    • onlize's avatar
      onlize
      Aspirant

      Hello, thank you for your reply.

       

      Ports are opened and listening. I can telnet to both servers internally, but I cannot connect when I am outside of my network.


      I tried to connect using the ddns service and the public IP address that I see in my Orbi control panel. I have the same results. No connections.