DNS on Linux box fails from WinXP client after a few minutes.

scottzed_at_gmail.com
Date: 04/07/05 

Date: 6 Apr 2005 19:29:14 -0700

I'm pulling my hair out with a networking problem I've been having. I
have a Linksys router that connects to my cable modem. I have a Redhat
Fedora Linux box, a Windows XP box, and a Mac laptop that are connected
to the router (a cornicopia of OSs!). I want to set up this home
network so that the Linux box will act as the DNS, so I can resolve
internal addresses, etc.

Now, this seems to be working OK, except for one thing - my WinXP box
suddenly fails to resolve domain names after about 5 minutes or so.
nslookup _always_ works - it queries the Linux box and gets the right
answer. ping and Internet Explorer / Firefox stop working for any
domain name after a few minutes. The Mac OS X laptop never has a
problem - its ping and browser always work.

When I turn on query logging and monitor the Linux /var/log/messages,
and then web browse on the failed WinXP client, named detects the name
resolution request, appears to be working fine, but often says "same
message sent x times" (x=3-5) (like the response doesn't reach the XP
box?). This is completely bizarre, and I don't even know where to
begin troubleshooting.

Does this ring a bell for anyone?

Thanks in advance,

Scott

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