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Thread: Internet suddenly doesn't work anymore. How to fix?

  1. #1
    Join Date
    Jan 2007
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    Ubuntu Development Release

    Question Internet suddenly doesn't work anymore. How to fix?

    Hello,


    I've got Ubuntu 8.04 working perfectly for about 1.5 years now. More than a week ago, my internet suddenly stopped working though. I first thought it was the fault of my ISP, but I just plugged the cable in the Windows Vista laptop of my sister and that works perfectly (writing on it now).

    I wouldn't know where to start searching for the problem. Could anybody help me out..

  2. #2
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    UK PLC
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    Ubuntu 14.04 Trusty Tahr

    Re: Internet suddenly doesn't work anymore. How to fix?

    Quote Originally Posted by kramer65 View Post
    Hello,


    I've got Ubuntu 8.04 working perfectly for about 1.5 years now. More than a week ago, my internet suddenly stopped working though. I first thought it was the fault of my ISP, but I just plugged the cable in the Windows Vista laptop of my sister and that works perfectly (writing on it now).

    I wouldn't know where to start searching for the problem. Could anybody help me out..

    Please can you post the output of

    Code:
    ifconfig
    and

    Code:
    lshw -C network
    I have a major malfunction!

  3. #3
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    Re: Internet suddenly doesn't work anymore. How to fix?

    I couldn't copy-paste the outputs since they are on the pc without internet. So I took a photo using my phone and hereby upload the pictures. I hope it tells you anything, since it is like Greek to me.
    Attached Images Attached Images

  4. #4
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    Jul 2006
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    Re: Internet suddenly doesn't work anymore. How to fix?

    Did you try restarting your router?

  5. #5
    Join Date
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    Re: Internet suddenly doesn't work anymore. How to fix?

    Yes, I also did a reset of the router (with the reset button), restarted ubuntu multiple times, and unplugged and replugged everything. I presume you don't see anything wrong from the photos I took?

  6. #6
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    Re: Internet suddenly doesn't work anymore. How to fix?

    Quote Originally Posted by kramer65 View Post
    Yes, I also did a reset of the router (with the reset button), restarted ubuntu multiple times, and unplugged and replugged everything. I presume you don't see anything wrong from the photos I took?
    Network stuff isn't really my forte but I didn't see anything out of the ordinary.
    In particular, eth0 seems to have an ip address that I assume was handed out by your router's dhcp.

    I guess Firefox will not work but can you ping anything?

    Code:
    ping -c4 www.google.com
    or failing that

    Code:
    ping -c4 64.233.169.106
    At the end, it shoudl tell you how many packets were lost, if any.

  7. #7
    Join Date
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    Re: Internet suddenly doesn't work anymore. How to fix?

    It says, "network is unreachable"..

  8. #8
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    Re: Internet suddenly doesn't work anymore. How to fix?

    Try

    Code:
    sudo iconfig eth0 down
    sudo ifconfig eth0 up
    Then do dmesg.

    At the end of long output, tt should talk about the interface going down and up.
    But if you see any additional possible error output near the end please note it down.
    Also, try pinging stuff again.

    I can't really say "this is happening because" but hopefully there will be some clue eventually.

  9. #9
    Join Date
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    Singapore
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    Ubuntu 9.10 Karmic Koala

    Re: Internet suddenly doesn't work anymore. How to fix?

    hey anyway, my problem is the exact opposite. Dual booting, windows wifi failed me but ubuntu save me. Maybe if you have another os/live cd pop it in and try using the internet. If it works maybe it is something with what you installed.
    I love being on the edge of technology. And i love being with Ubuntu.

  10. #10
    Join Date
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    Re: Internet suddenly doesn't work anymore. How to fix?

    I did what you asked. Attached is the image of the last part of the dmesh command. Does that give you any clues?

    One more thing. It is not only firefox which is not working. I also tried to connect to the internet using Epiphany, Google Chrome, Transmission, and Filezilla, but none of them could connect.
    Attached Images Attached Images

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