Double NAT Port Forwarding Problem

  • Hello guys, i have an issue with double NAT port forwading,  my pfsense is connected to the ISP router which i have limited access on it. can anyone advise me how to set up port forwarding in double NAT. thanks in advance.

  • LAYER 8 Netgate

    The ISP router has to forward to you, then you need to forward that to the inside.

  • in my ISP router, i configure the port forwarding DMZ pointed to my pfsense but still ports are close.

    ![PORT FORWARD.JPG](/public/imported_attachments/1/PORT FORWARD.JPG)
    ![PORT FORWARD.JPG_thumb](/public/imported_attachments/1/PORT FORWARD.JPG_thumb)

  • LAYER 8 Netgate

    That all looks fine. First thing I would do is packet captire on WAN on port 8090 and try a couple connections. You should see TCP SYNs arriving.

    Other than that:

    When port forwards fail it is almost always something on that list. Check it all.

  • noted. i will try to check the packet capture. btw, i tried to test from inside the local network and it is working but  after checking from an outside machine it doesnt work and port also closed.

    ![inside network.JPG](/public/imported_attachments/1/inside network.JPG)
    ![inside network.JPG_thumb](/public/imported_attachments/1/inside network.JPG_thumb)
    ![port check.JPG](/public/imported_attachments/1/port check.JPG)
    ![port check.JPG_thumb](/public/imported_attachments/1/port check.JPG_thumb)

  • i solved the issue. i just added the server in my captive portal to access the internet that i was trying to port forward.  thanks Derelict.

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