WRT54G v5 port triggering doesn't work

Discussion in 'Cisco/Linksys Wireless Routers' started by barcathegreat, Jul 25, 2006.

  1. barcathegreat

    barcathegreat LI Guru Member

    I have been using the router for a couple of months now. I had no idea that the IP was based on first come first serve basis so when i got an error with ip conflict in my desktop, it turned out to be that desktop and the laptop were trying to use the same ip... never happned that b4. Later it turned out that i need to update my port forwardings for the bittorrent clients these 2 comp uses. I talked to tech support and they told me to use static ip but since it have dsl and sometimes router needs resetting, i woud need to update DNS # everytiem in the computer. So the tech suggested that i use port triggering and that doesn't need an ip address, it will forward all the ports listed no matter which ip it is coming from (my desktop or the wireless laptop). but when i tried using the port triggering, it doesn't forward the ports. I used Azureus and uTorrent's port checking feature to confirm that ports were not being forwarded. Tech told me that they would send me another router since reflasihng it didn't work. But i would post likely have to pay for shipping. So i wanna keep the router if i can get the problem fixed. Any idea why port triggering isnt' working?
  2. jgutz20

    jgutz20 Network Guru Member

    you can use static and not worry about the router, just set the DNS to the router itself and then the router will point you to your ISP's DNS servers.

    as for azureus specifically
    Under Tools/Options then the connection tab you can specify the port for connections. make the laptop and desktop use different ports then you can forward for instance 6881 to the desktop and 7001 to the laptop (or whatever you use) and just the port forward on the router. thats going to be the easiest way to configure the router for what you want to do.
  3. barcathegreat

    barcathegreat LI Guru Member

    Ports i am using are different. As for static IP, how do i point to the DNS @ router? I need to put something in the DNS part....
  4. Esquire

    Esquire Mesquire Staff Member Member

    Is there a reason why you want to use Port Triggering? Port Triggering requires outbound traffic to open inbound ports, and probably why the trigger isn't working. You might get better luck with using UPnP on your router, Windows, and BitTorrent clients.

    You should be able to forward different ports to each computer using just Port Forwarding. uTorrrent and Azureus should be able to let you set which port to use.

    If your problem stems from IP address assignment issues, how many clients is your router's DHCP server be allowed to distribute? The default is 50 LAN IP addresses to 50 networked clients - one per client.

    DNS server is something entirely different - it's for mapping a web domain to a specific IP address (e.g., so you can navigate by typing Linksysinfo.org instead by its IP address), so if you can navigate using IE, Firefox, Opera, etc., your DNS setup is working.
  5. barcathegreat

    barcathegreat LI Guru Member

    The reason i wanted to use port triggering is to use bittorrent clients on the 2 computers. Now it makes sense why port triggering isn't working, its not same as port forwarding and those tech support @ linksys dind't know that lol! Well port forwarding requires me specify the IP. Since IP changes, i will have to update the forwrding ip everytime. But for some reason the IP changed only once and now i realized even when my deskop starts first, it still gets the second ip, which it had earlier. If that continues, then i don't have to worry about ip change!
  6. Esquire

    Esquire Mesquire Staff Member Member

    I am fully aware of the problem you are facing - was just wondering why you thought Port Triggering would do the trick.

    How many clients are your router's DHCP allowed to distribute? Have you limited it to a smaller number from the default of 50 IP addresses?

    Have you tried extending the DHCP lease time so IP addresses are leased out longer?
  7. barcathegreat

    barcathegreat LI Guru Member

    I have not changed anything like that. I thought port triggering would do the trick because as i understood (how port triggering works) is that any computer in my network who requests those ports would be open, regardless of its ip.... but as u said, that's not how it works, it works by listening to ports COMING in, not programs requesting ports usage from inside!

    All the other settings beside MTU is default.
  8. Esquire

    Esquire Mesquire Staff Member Member

    Do give what I have been suggesting a try.

    I find that by restricting DHCP server to distribute what you need, the IP doesn't get reassigned unless the router reboots, so if you only have 2 computers, set it to 2. You may even want to set it to 3-5 clients in case you need to connect to new network devices in the future.

    You can also try setting a longer DHCP lease period.
  9. barcathegreat

    barcathegreat LI Guru Member

    If i disable the DHCP, will that mean that whatever IPs the computer have now will be permanent? And do i need to enable when i plug in additional devices?
  10. Esquire

    Esquire Mesquire Staff Member Member

    Not as easy as you implied.

    Disable the DHCP server means the router no longer manages IP distribution so your network clients or devices must rely on their own TCP setup for IP and DNS addresses since they are not getting the info from the router anymore. And you will need to configure manually each new client as well.

    If you don't want the hassle, keep DHCP on and give my suggestion a go.
  11. kop48

    kop48 Network Guru Member

    You COULD just flash DD-WRT on it and use Static DHCP... ;) ... or use uTorrent with UPnP turned on and not worry about port forwarding...?
  12. Esquire

    Esquire Mesquire Staff Member Member

    I agree. I already mentioned the use of UPnP as a possible alternative but flashing to DD-WRT on a v5 may not be his cup of tea.
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