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WRT54G V8 and Roadrunner

Discussion in 'Cisco/Linksys Wireless Routers' started by onecrane, Jan 16, 2008.

  1. onecrane

    onecrane LI Guru Member

    I have a brand-new, out-of-the-box WRT54G version 8 that seems to be in good working order - the only trouble being that it can't get to the internet. For some reason it's not getting an IP from the cable modem.

    This network is using Roadrunner cable as its ISP, and is currently working just fine on an old BEFSR41 version 3. But when I try to cut over to the new router, the router doesn't get an address. The router's clients all get addresses just fine; I can log in and configure it wirelessly or wired, no sweat. But it's not getting an external IP.

    The best solution I've heard so far to this problem is that Roadrunner authenticates via MAC address, and so I should power down/up the modem, to let it "forget" the MAC address it's expecting on the other side, and then to power it back up connected to the new router. That didn't work. Next solution was to spoof the old router's MAC address. Also no good. Third possibility is that the old router is spoofing the MAC address of whatever machine was used to originally set up the cable modem connection. That machine, whatever it was, is long gone.

    I'd love to just hop into the old router's admin and copy its configuration myself, naturally - hell, the setup CD for this new router offered to let me do just that! But, of course, the old router was set up by "somebody else," my friend tells me, and who only knows what its password is. I certainly don't, and neither does my friend.

    The real kicker is that the internet connection *only* works through the old router. Connecting the modem directly to a machine results in the same behavior - no address returned from the modem. I suppose it's possible that the gentle non-techies whose network this is might have been upsold into a static IP, but I really doubt it.

    Am I hosed? Or is there something I can actually do about this?

  2. onecrane

    onecrane LI Guru Member


    A MAC sweep reveals that the router is using its original MAC address. Of course, I suppose it could be spoofing on the outbound and using its hardware MAC on the LAN - but that's a guess. I don't even know if it can work like that.

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