RE: OT: Tool to identify Evaluate DNS clients?

Hi Willaim,

You just need to look at the decode for a few of the DNS messages to
confirm a what I think might be going on.

Tom
www.isaserver.org/shinder
Get the book!
Tom and Deb Shinder's Configuring ISA Server 2004
http://tinyurl.com/3xqb7
MVP -- ISA Firewalls



-----Original Message-----
From: William Robertson [mailto:robertson.william@xxxxxxxxxxxxxx] 
Sent: Tuesday, August 17, 2004 9:14 AM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: OT: Tool to identify Evaluate DNS clients?


http://www.ISAserver.org

Unfortunately a packet sniffer doesn't allow me to aggregate the
information, and it also just shows so much detail it is difficult to
get to
the gist of the query...

-----Original Message-----
From: PESA Postmaster [mailto:isalist@xxxxxxxx] 
Sent: 17 August 2004 03:51 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: OT: Tool to identify Evaluate DNS clients?

http://www.ISAserver.org

Packet sniffer?

PESA Postmaster

----- Original Message ----- 
From: William Robertson
To: [ISAserver.org Discussion List]
Sent: Tuesday, August 17, 2004 8:36 AM
Subject: [isalist] RE: OT: Tool to identify Evaluate DNS clients?


http://www.ISAserver.org

Hmmm, tried to avoid saying that... what I am seeing is that my internet
link is saturated with outbound DNS requests. In my Firewall Logs I can
only
see my 2 DNS servers as doing the requests for outbound DNS queries,
which
is the way it is meant to be...

But what I am presuming is that some client workstation is
generating/causing a helluva lot of DNS requests, either via directly
contacting my DNS Server, or by requesting Port 80 traffic which will
then
route via my Firewall to my DNS Server, and then back through my
firewall.

So I was hoping to tackle the easier scenario first, and hoping to
generate
some sort of realtime/historical report which will show me the "Top
Requesters" for DNS resolution against my DNS Servers...

Is there something like this?




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