New to the forums; I have a few questions.

Discussion in 'DD-WRT Firmware' started by judas989, Sep 26, 2005.

  1. judas989

    judas989 Network Guru Member

    Hello everyone,

    I stumbled across this site after searching Google for info on do-it-yourself WiFi antennas and thought that the DD-WRT firmware sounded like it may be a great addition to my setup.

    So far my colleague and I have successfully setup two WRT54G's (1.0 & 4.0) with the DD-WRT v23b Standard firmware (9/23) and have been playing around w/ RFlow. I'm very satisfied w/ the performance and plethora of features compared to the Linksys official firmware.

    That said, I have some questions about the setup that the documentation and Wiki do not seem to provide.

    I should probably mention my exact setup to ease the answering.
    1) Charter cable connected to the WAN port on the WRT54Gv4.
    2) A makeshift "router" Windows XP PC which collects the WRT54Gv4's wireless signal using a home-made antenna (similar to the ones found on this page).
    3) The "router" Windows XP box then shares the connection via CAT5e, to the WAN port on the WRT54Gv1.
    4) The WRT54Gv1 then broadcasts it's wireless signal, which basically expands the network.

    The first issue we ran into was that the WRT54Gv1 (essentially the last link in the chain) could not accept incoming connections via certain ports. We are sure it's related to the Windows box routing the connection.

    The only thing we've tried making the Windows box the DMZ, which allowed it to receive incoming connections. What we need however, is to be able to allow incoming connections on the PCs connected to the WRT54Gv1, which is hosted by the Windows box; so even though the Windows box could receive connections, that's not what we need.

    Now we do have a couple limitations; the first being that the routers are just a bit too far to be wirelessly connected (WDS?). This is the reason we have the Windows box routing the signal using an external antenna; the antenna can be moved about much easier and is much stronger than the Linksys antennas.

    The other limitation is that the WRT54Gv4 is on the other side of a brick building, so we're fairly limited to the router's omni-directional antennas. We have also tested larger antennas for both routers, but to no avail in signal. So ultimately our best bet at the moment, is the USB adapter antenna.

    My next question is: how dangerous can it be to boost the transmission signal on the routers? At the moment, we have both routers boosted to 70mW and the signal is definitely better. We're both a little concerned about them frying or something, though. Is there a safe range? Also, could the routers be modified somehow (i.e., with heatsinks) to boost the signal further while controlling the heat?

    If you've read this far, thanks very much for doing that much, LOL. I personally work in a Help Desk environment and I know how frustrating it can be to have little information on a subject so I tried to give as much as I could think of.

    Thanks in advance.
  2. judas989

    judas989 Network Guru Member


    We've solved the Windows port forwarding.

    Can anyone answer the question about the Xmit power?
  3. BrainSlayer

    BrainSlayer Network Guru Member

    you should use a small passive cooler if you want to go higher. normally it isnt a problem, but i'm living in germany and here it isnt so hot all the time outside.
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