Internet Connection Problem

Discussion in 'General Discussion' started by JennL, Jul 9, 2006.

  1. JennL

    JennL Guest

    I have a cable modem and have had my wireless network set up and working properly for a couple years. When I returned from being out of town, my internet connection was lost.

    I can plug in my computer directly to the cable modem and the internet connection works fine. I have gone through the power re-cycling process and reset the router, but still have had no luck. I chatted with Linksys tech support for a couple hours and they were no help.

    My laptops can see the wireless network and connect fine, but there's no internet access. Suggestions?

    Is it possible that the internet port on the router is bad? If so, is there a way to use one of the other ports...rather than buying a new router?
  2. Esquire

    Esquire Mesquire Staff Member Member

    Try cloning the MAC Address of your computer's ethernet adapter (the one that works with the cable modem) to the router using its MAC Address Cloning function, and see if it can re-establish a connection.

    You may not need to know the MAC Address your ethernet adapter if you were to connect the computer to the router using a LAN connection and logon to the router through it - MAC Address Cloning function on some Linksys routers includes a button that will copy the MAC Address of the existing LAN connection to the router.

    Failing that, you can always obtain the MAC Address manually:

    (for Windows 2000/xp)
    Go to Start > Run
    Run: CMD
    This will load Command Prompt
    At the prompt, execute IPCONFIG /ALL
    The MAC Address is shown as the Physical Address in Windows
  3. Chuck_IV

    Chuck_IV Network Guru Member

    I'm digging this up because this exact thing happened to me. My internet went down during a storm, about a week ago, that toasted my cable modem. I replaced the cable modem, but my router no longer would pull the ip from the cable system. I was pulling my hair out, trying to get it to pull the ip, because everything else on the router(WRT54GX4) worked(wireless clients connected fine). I was ready to replace the router, thinking it got toasted a bit, until I came across a post at, saying to clone the MAC IP of my PC. When I did that, the internet started working perfectly again.

    My question is, what is causing me to HAVE TO do this now(no matter what order I power things up, it is always required and releasing and renewing in the router doesn't pull the ip either, without cloning), in order for the router to pull the ip? I never had to do any cloning, in the past(had the modem for 6 months and was always connected without cloning) and still don't have to do it, on an old WRT54GS, which I was using, in the interim.
  4. Toxic

    Toxic Administrator Staff Member

    sounds like the ISP changed the Cablemodems IP address whist you were away.

    reboot your cablemodem, and the your router. that should pick it the connection again.
  5. Chuck_IV

    Chuck_IV Network Guru Member

    Did all that. Rebooted my cable mode, router, pc in every conceivable order, yet the router just won't grab the ip from the modem now, even using release/renew inside the router, unless I clone my PC's MAC ID.

    Throwing out a complete guess, maybe when my cable system went down(they were down for about 12 hrs), during that storm(same storm that toasted my modem), when they brought it back up, they set it up so they now require MAC ID cloning of your PC? That's the only thing I can see as to why it's required now and wasn't before.
  6. Chuck_IV

    Chuck_IV Network Guru Member

    OMG. I just turned off MAC cloning and redid the turning off and back on of the modem, then the router and it works again, like it used to, without MAC cloning. Ugh! I am certain I did this and many other things, last night, to no avail. :(

    <confusion on>
  7. jgutz20

    jgutz20 Network Guru Member

    thats computers for ya
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