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Alex99y's avatar
Alex99y
Aspirant
Jan 23, 2020

Issue in Port Forwarding

Hello!.

First, this is my device information:
Firmware Version V2.05.18

Model: N450 - cg3000dv2 

O.S: Windows 10 / Ubuntu 18.10

 

The Port Forwarding service, is not working, i tried all things, including reboot, change port range, external address, ...

Im a software developer, recently i changed to this device, i have my service hosted in 192.168.0.2 and work perfectly, i can see my website in my phone that is conected in the same network. But using my public address, i got connection timeout error after waiting some seconds.

 

Is there another configuration that i didn't saw? or im doing something wrong?

1 Reply

  • > The Port Forwarding service, is not working, [...]

     

       Which you determined how, exactly?

     

    > [...] recently i changed to this device, [...]

     

       "changed" from what?  Same ISP, or different?  Same public IP address
    or different?

     

    > [...] i have my service hosted in 192.168.0.2 and work perfectly,
    > [...]

     

       What is your "my service"?  "work" how, exactly?  In your
    (unspecified) client, were you specifying the LAN IP address of the
    server?  What happens if you specify the WAN/Internet IP address of the
    CG3000Dv2?

     

    > img3.png


       I can't see the server IP address in that picture.  Is it
    "192.168.0.2"?  Is that a static or reserved dynamic address, or are you
    trusting in luck to keep the server LAN IP address fixed?

     

    > [...] i can see my website in my phone that is conected in the same
    > network. [...]

     

       Is your "my website" related to your "my service"?

     

    > [...] But using my public address, i got connection timeout error
    > after waiting some seconds.


       "using" how, exactly?  What is your "my public address"?  ("a.b" out
    of "a.b.c.d" would be enough.)

     

       Does your "my public address" match the WAN/Internet IP address of
    the CG3000Dv2?  (ADVANCED > ADVANCED Home : Internet Port : Internet IP
    Address)

     

       The usual problems with this stuff are:


       1. Wrong external IP address (different from the port-forwarding
    router's WAN/Internet IP address).  (An intermediate NAT router, for
    example, could cause this.  Or an ISP using carrier-grade NAT to
    conserve IPv4 addresses.)

     

       2. Bad port-forwarding rule (wrong port(s), wrong target address --
    including a wandering target).

     

       3. Server not listening on the port-forwarding target system.

     

       4. External influences: ISP blocking, other firewalls, ...

     

       Item 3 might be covered, but not enough information to decide on the
    others.