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Re: LVS with DNS?

To: dan@xxxxxxxxxxxxxx, <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: LVS with DNS?
From: Joseph Mack NA3T <jmack@xxxxxxxx>
Date: Thu, 29 Sep 2005 05:30:56 -0700 (PDT)
On Wed, 28 Sep 2005, Dan Trainor wrote:

Hello, all -

Sorry to not reply with the correct headers here; I just signed up for
this list, and it just so happened that Jacob Coby asked a question that
was similar to the one which I wanted to ask, so here goes.

and what is your question?

The problem with DNS is not the servers but the resolvers AFAIK. The nameserver can be hung in a way that the client resolver interprets as there being no IP for the name, and it doesn't go onto the next nameserver in the list. A client should be able to differentiate no answer from one saying that there is no resolution for that name. I can't imagine how the broken clients (in all OSs) are going to be fixed and we aren't the people to fix it.

The nameresolving process is totally broken

http://www.austintek.com/LVS/LVS-HOWTO/HOWTO/LVS-HOWTO.services.general.html#name_resolution

and no-one seems to have noticed. The only solution I can
see is to present a perfect nameserver via something like
LVS, where the client never sees a bad nameserver.

Joe

--
Joseph Mack NA3T EME(B,D), FM05lw North Carolina
jmack (at) wm7d (dot) net - azimuthal equidistant map
generator at http://www.wm7d.net/azproj.shtml Homepage http://www.austintek.com/ It's GNU/Linux!

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