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?