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Thread: interface no longer recognizes other networks

  1. #1
    Join Date
    Apr 2008
    Location
    Palmer, AK
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    37
    Distro
    Ubuntu 8.10 Intrepid Ibex

    Unhappy interface no longer recognizes other networks

    My ubuntu machine was working perfectly fine. Then something happened yesterday ( i can't recall any changes made ).

    All of a sudden it will talk to any and all device in its own network (192.168.1.0/24) but not anything off net. It won't hit internet addresses or my Debian box which is off the same router but in a seperate VLAN.

    I have made no changes to the router and have double checked its programming.

    I even ran Wireshark to capture it pinging the Debian box. It looks as though the Debian box replies, but for some reason it won't acknowledge the reply.

    My other machines can access the Debian box and the internet just fine.

    Any ideas?

  2. #2
    Join Date
    May 2007
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    UK near Bedford
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    3,481
    Distro
    Ubuntu Development Release

    Re: interface no longer recognizes other networks

    Sounds like the network gateway is not configured any more.
    PC

    To get a terminal command to put its output into a file use this format
    {terminal command} > {filename}

  3. #3
    Join Date
    Dec 2006
    Location
    Oregon, US
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    1,541
    Distro
    Ubuntu Development Release

    Re: interface no longer recognizes other networks

    What the other guy said...make sure you have a gateway set (will be your router's ip address).

    You can check your gateway by typing "route -n" in a terminal.

  4. #4
    Join Date
    Oct 2008
    Location
    colachel
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    513
    Distro
    Ubuntu 13.10 Saucy Salamander

    Re: interface no longer recognizes other networks

    check

    var/log/messages

  5. #5
    Join Date
    Apr 2008
    Location
    Palmer, AK
    Beans
    37
    Distro
    Ubuntu 8.10 Intrepid Ibex

    Resolved: interface no longer recognizes other networks

    Quote Originally Posted by jimv View Post
    What the other guy said...make sure you have a gateway set (will be your router's ip address).

    You can check your gateway by typing "route -n" in a terminal.
    You win!! I was checking my /etc/network/interfaces configuration for my gateway and it was there as it should be, so I was confused.

    I tried the route-n and it showed 0.0.0.0 as my gateway.

    Confused, I checked my /etc/network/interfaces again and found that I had, in error, configured a different gateway on eth0 as well, which was not necessary because it's used to just view packets in promiscuous (if only Mom knew) mode.

    Resolved, thanks.
    Last edited by AKviking; April 24th, 2009 at 06:15 PM. Reason: Resolved

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