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Thread: Can't connect after connecting to a wireless router

  1. #1
    Join Date
    Apr 2007
    Location
    Shanghai
    Beans
    48
    Distro
    Ubuntu 9.10 Karmic Koala

    Can't connect after connecting to a wireless router

    I have very little understanding (ok no technical ability so be gentle)

    Ubuntu 10.10 connects to a DSL modem without any problems - I mean I just plugged it in and it worked - GREAT

    I bought a wireless router so I could connect my netbook and now my Ubuntu machine which is simply using a cable from the wireless router now DOES NOT connect.

    I tried a windows machine on the wired connection from the wireless router and it connects without a problem.

    OF course if I remove the wireless router from the chain, i.e. simply connect directly to the modem it works straight away.

    I guess I have covered what happens - anyone know how I can fix this?

    Thanks

    Gibby
    Last edited by gibsonsimswilson; October 30th, 2010 at 03:40 PM.

  2. #2
    Join Date
    Sep 2010
    Beans
    82
    Distro
    Ubuntu 11.04 Natty Narwhal

    Re: Can't connect after connecting to a wireless router

    Without knowing the manufacturer and model of your wireless card it's kind of hard to do much. If you can find that out, it would be the first step. post the results of
    Code:
    sudo lshw -C network
    Code:
     iwconfig
    and
    Code:
    ifconfig

  3. #3
    Join Date
    Apr 2007
    Location
    Shanghai
    Beans
    48
    Distro
    Ubuntu 9.10 Karmic Koala

    Re: Can't connect after connecting to a wireless router

    Hi

    Thanks for the reply but there is NO card..

    I am simply connecting the ubuntu machine to the wireless router using a cable NOT wireless

    cable--modem---cable---wireless router---cable---ubuntu machine

    Take the router out of the chain and it connects immediately as before...

    Thanks

  4. #4
    Join Date
    Aug 2010
    Location
    hole
    Beans
    417
    Distro
    Ubuntu

    Re: Can't connect after connecting to a wireless router

    what do you mean by wont connect to the router?
    first make sure that there is a wired connection.
    then use the ifconfig to see your network connection status and ip address
    the try the command

    ping 8.8.8.8
    (to google dns servers)

    if you are getting reply from 8.8.8.8 that means you should try to edit the /etc/resolv.conf
    and add the lines
    nameserver 208.67.220.220
    nameserver 8.8.8.8

    or instead the IP address of your local ISP dns servers.

  5. #5
    Join Date
    Sep 2010
    Beans
    82
    Distro
    Ubuntu 11.04 Natty Narwhal

    Re: Can't connect after connecting to a wireless router

    If that's the case, I would suggest calling your ISP to see what settings are required for the router in order to connect to the internet such as is dchp automatic, is it ppoe, etc...... Depending on your ISP many of those settings can be different, but I would make sure they are all correct before looking further.

  6. #6
    Join Date
    Apr 2007
    Location
    Shanghai
    Beans
    48
    Distro
    Ubuntu 9.10 Karmic Koala

    Re: Can't connect after connecting to a wireless router

    First my internet works fine I have been connected fine
    The problem starts when I connect the wireless router
    USING A CABLE FROM THE WIRELESS ROUTER I now can not connect

    If I switch the ubuntu machine for a windows machine - works no problem

    Take away the router and the ubuntu machine connects straight away again


    So all seems to work (using a windows machine no changes needed)

    But when I connect the ubuntu (remember all cables I am not using the wireless) does not now connect

    Thanks

  7. #7
    Join Date
    Apr 2007
    Location
    Shanghai
    Beans
    48
    Distro
    Ubuntu 9.10 Karmic Koala

    Re: Can't connect after connecting to a wireless router

    Sorry I think my explanation was not too good

    I have normal internet with a modem and my ubuntu machine works no problem

    I bought a wireless router so I could use the wireless for another machine

    THE UBUNTU MACHINE WOULD BE WIRED TO THE WIRELESS ROUTER VIA A CABLE - NOT WIRELESS CONNECTION

    When I connected it up it does not connect to the internet, if I remove the wireless router it works fine

    Now if I use a machine with windows connected to the wireless router with a cable, it works !!

    So I think there is a problem with connecting the ubuntu machine with a cable to the wireless router

    Thanks

    Gibby

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