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DNS query???
From: "Verma, Sachin" <SVerma () ocwen com>
Date: Tue, 27 Jul 2004 08:01:26 -0400

Hi,

I have a secondary dns server,which is internal to LAN and on windows 2000
that is generating a lot of queiries for all the 13 root dns servers.The
traffic is blocked by the firewall.But the strange thing that I have noticed
is that the source and destination port being the same i.e 53.Also the
forwarder is correctly set on the DNS server and hence theoritically the
querries need to be forwarded to the next DNS server.

Any body got an idea as to what is this.


S () [|-|i/\/


-----Original Message-----
From: Paul Rolland [mailto:rol () witbe net]
Sent: Tuesday, July 27, 2004 4:11 PM
To: 'Paul Schmehl'; full-disclosure () lists netsys com
Subject: Re: FW: [Full-disclosure] Question for DNS pros


Hello,

The machine sending the queries is probably configured to use
your server as a complete DNS resolver and transfer all its queries
to your server.

Umm...I don't *have* a server at that address.  In fact, 
there is no live 
host at all at that address.  *That*, after all, is the 
entire point of 
this thread.

Understood, but this doesn't prevent someone from making a mistake
when creating its configuration file... and if the resolver has more
than one host (including yours), then failure from your machine will
simply let him skip to next host, which in fact only slows down DNS
resolution. Thus, people are likely to live with a broken configuration
for long...

Collect the source IP(s), find the admin and send him an email...

Regards,
Paul

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