Sudden problem with LAN access to some of the net

From: Claude Jones (claude_jones_at_levitjames.com)
Date: 09/29/05

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    To: For users of Fedora Core releases <fedora-list@redhat.com>
Date: Thu, 29 Sep 2005 08:53:09 -0400

    This problem has so stumped me I don't know if I can fairly describe it, but I
    post what I can here to see if it strikes a chord with anyone else. My
    scenario is an FC4 machine that is right on the net - I use this as my home
    machine and it is mostly for experimentation and email. I use FWBuilder to
    protect it. It serves as dhcp server to several pc's in my home all running
    Windows. All has been working well for months. Two nights ago, I was trying
    to get bittorrent to work and was experimenting with opening various ports.
    That same night I did some updates. That's a poor description, I realize, but
    it is just to set the stage. The next morning, two of the pc's on my Lan had
    lost some of their connectivity. My wife's laptop, for example, couldn't get
    email or run messenger - just returned 'couldn't connect' messages. However,
    she could still browse websites. Similar problems with a second pc that I
    don't have much access to, so I can't be specific but, he couldn't get mail.
    Two other pc's continued to function normally. I fired up an old laptop I
    keep here for testing, and it connected and all functions worked.

    So -- dhcp is working - the problem machines are getting valid addresses -
    they continue to have some functionality
    I suspect an issue with DNS - I had set up a DNS server on my FC4 box months
    ago, and it has been working well - dhcp gives out 127.0.0.1 as the dns
    server to the lan machines - what I did to fix the problem was to change that
    entry in dhcp to my isp's DNS server - presto, things started working...

    So, any ideas on what I could have broken with my DNS configuration? 

    -- 
Claude Jones
Bluemont, VA, USA
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  • Next message: Tim: "Re: how do you make the keyboard shortcuts work? (FC4)"

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