Wireshark-users: Re: [Wireshark-users] DNS traffic - newbie question

From: Scott Parkis <scottparkis@xxxxxxxxx>
Date: Mon, 11 Dec 2006 13:02:29 -0800 (PST)
Thanks  - how can i tell if the app is making the request? Is there a way to extract information in the packet?

----- Original Message ----
From: Stephen Fisher <stephentfisher@xxxxxxxxx>
To: Community support list for Wireshark <wireshark-users@xxxxxxxxxxxxx>
Sent: Monday, December 11, 2006 2:48:32 PM
Subject: Re: [Wireshark-users] DNS traffic - newbie question

On Mon, Dec 11, 2006 at 11:33:14AM -0800, Scott Parkis wrote:

> I am looking at my capture. My machine is connected via a swith to the
> LAN. I have a ton of standard queries coming from my machine going out
> to the LAN. Not sure why, I am not making the DNS request. It does go
> to my internal DNS servers. But half of the machines are on the LAN
> and the other half do not exist.
>
> What is it that I am seeing here. Thanks,

You're probably seeing DNS requests from Wireshark.  By default, it
does a DNS lookup on every IP address it sees in the capture that you're
doing.  This can be disabled under the View -> Name Resolution menu by
unchecking "Enable for Network Layer."


Steve


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