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Port Forward Problem

Discussion in 'Tomato Firmware' started by xman111, May 29, 2014.

  1. xman111

    xman111 Network Newbie Member

    Hi guys, trying to share out my Plex Server remotely when me, my wife and kids go to Hawaii.

    I have an Asus RT-N16 router running a modified version of Tomato firmware. It is a version from Sabai Technology who specialize in routers pre-loaded for VPNs.

    The problem is I cannot forward any ports to my local machine. Plex can use UPNP or NAT-PMP to automatically forward ports but that doesn't seem to work. So all i want to do is manually forward a single port. I try to forward port 32400 to my internal machine but any port checking programs i use always show the port as closed. I even put my computer in the DMZ and it still doesn't work.

    As soon as i hook up my PC directly to the cable modem and take the router out of the equation, it works right away so something is funny with my router.

    Any help would be greatly appreciated, sorry for the long first post.

  2. xman111

    xman111 Network Newbie Member

    here are a couple screen shots..

    Attached Files:

  3. koitsu

    koitsu Network Guru Member

    You should contact Sabai Technologies, as they are the maintainer of this firmware. It doesn't matter if it's "based on Tomato", they're still the responsible party as they're the ones who publicly release it.
  4. xman111

    xman111 Network Newbie Member

    Koitsu, they have no answers, can't figure it out, that's why i'm trying to figure it out with the help of some smarter people than myself. :)
  5. koitsu

    koitsu Network Guru Member

    I see. It sounds like you should change firmwares then. :) I think everyone here on this forum can assure you DMZ as well as port forwarding both work correctly, so if you were to change and things did not work, the issue is certainly with your setup (either physical cabling/wiring topology or some piece of hardware/technology that is in the mix causing complications (this is quite common)).

    Any time I see claims that TomatoUSB's port forwarding (as in when using a real TomatoUSB firmware, not "something based on Tomato") doesn't work I almost immediately throw out the thread because it's nonsense. It always has to do with someone's setup, either topology/wiring or (more common on this forum) crazy features/configuration the person is doing. Ex. "Yeah this doesn't work" {3 weeks into the debugging/troubleshooting} "Did I mention I have a router behind a router?" "I hate you and I'm not talking to you ever again". :)

    I have seen where people change firmwares and do not clear/erase NVRAM after changing and that being the cause of problems, but TomatoUSB makes that a snap, so if you were to switch just be sure to do that.
  6. xman111

    xman111 Network Newbie Member

    Im sure it is probably a problem on my setup. I don't want to change firmwares as Sabai has the dual gateway feature where you can setup the VPN then just choose with a button as to weather you want each device on the network to be either local or through the VPN and switch back and forth in seconds. I was just hoping someone could look though an output to see if my port forwards were sticking. I would try other firmwares just to confirm that the hardware works.
  7. remlei

    remlei Networkin' Nut Member

    I think youre doing a double nat on your setup.

    in your cable modem. configure it as a bridge mode, or put tomato's WAN IP address in DMZ.
  8. xman111

    xman111 Network Newbie Member


    after spending weeks working on it I figured it out after another whole night of tinkering and troubleshooting. You are right though. My cable modem somehow switched back to router mode, from the bridged mode I asked Shaw to put it in about a year and a half ago. No matter what I did on my router, nothing would get by the Shaw cable modem/router. So nice to be able to have full control of my network again. Now me and my family can watch all our Plex media from anywhere in the world. Thanks guys, case closed :)

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