Port forwarding not working with ports higher than 899

Discussion in 'Tomato Firmware' started by Sakis, Oct 2, 2011.

  1. Sakis

    Sakis Networkin' Nut Member

    Hello everyone,

    I am glad to join your community.

    I would like to ask for your help about my tomato router (WRT54GS.) The problem I am having is that when I open (and forward) a port that is above 899 then that port is not accessible from the internet. That is whether I forward the port manually or through UPnP. It is accessible from the same PC though. I have not tested from another PC on the same LAN but my guess is that it will still be working.

    I am using Ubuntu and Windows 7. Both of them have that problem, that leads me to believe that the problem is with the router. Still, I can not find any setting that would change that behavior.

    I used deluge (torrent client) and an "echo server" to open the ports and this online port scanner.

    Thank you in advance. :)

    EDIT: By the way, could this be from my ISP?
  2. Sakis

    Sakis Networkin' Nut Member

    The router seems to be doing it's job just fine. I just connected the internet cable directly to my PC and the problem remains. My ISP must have decided to block all the ports starting from 900 and up.

    Weird, why would they do that?
  3. Toastman

    Toastman Super Moderator Staff Member Member

    Might be a cockup - go complain!
  4. Sakis

    Sakis Networkin' Nut Member

    Hi again,

    Yep, it was the ISP's doing. I called them and they said it was perfectly normal.

    By the way, is there a way to open a port < 1024 on linux (without being root)?

  5. Toastman

    Toastman Super Moderator Staff Member Member

    Perfectly normal? What planet do they live on?
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