Re: DNS Query capture and analysis

[craig bowser <reswob10 () gmail com>]

There are two ways I have seen.  Off the wire or at the DNS server itself.

> From a high level, this is what you do.

If you do it off the wire, use tcpdump and filter for all port 53 TCP and
UDP.  You can then dump to pcap files and perform you analysis from there.

If at the server, for both Windows and *NIX, you must turn on debug logging
for the details.  Then you can script the analysis of the logs on a
periodic basis.

In general you want to look for hits to blacklisted domains, the top 10,
bottom 10, and top new domains.

There are plenty of how-tos and such out there, but in self interest, I'll
point to a project I did about a year ago.  It's pretty basic, but there
the MS Word document and Powerpoint slides have links and info that should
provide more information:

https://github.com/reswob10/ScourDNS





Craig L Bowser
____________________________

This email is measured by size.  Bits and bytes may have settled during
transport.


On Sun, May 26, 2013 at 9:53 PM, Tim Parker <timparkersec () gmail com> wrote:

> What's the best way to capture and analyze DNS queries and responses on my
> LAN?  Are there any good tools out there for this?  I can run a full
> capture on the WAN interface, but then what's good for automating the
> extraction of the DNS traffic?
>
> Thanks!
>
> _______________________________________________
> Pauldotcom mailing list
> Pauldotcom () mail pauldotcom com
> http://mail.pauldotcom.com/cgi-bin/mailman/listinfo/pauldotcom
> Main Web Site: http://pauldotcom.com
_______________________________________________
Pauldotcom mailing list
Pauldotcom () mail pauldotcom com
http://mail.pauldotcom.com/cgi-bin/mailman/listinfo/pauldotcom
Main Web Site: http://pauldotcom.com