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List:       nanog
Subject:    Re: Large number of DNS probes in last 24 hours
From:       Jim Wise <jwise () draga ! com>
Date:       2008-05-31 4:34:31
Message-ID: alpine.NEB.1.10.0805310030030.1704 () himring ! draga ! com
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On Fri, 30 May 2008, Michael Still wrote:

>Jim Wise wrote:
>> I've seen a surprising number of attempted recursive DNS requests 
>> against unpublished non-recursive DNS servers in the last 24 hours or 
>> so, many of them obviously probes of some sort (query for "." IN NS, 
>> eg).
>> 
>> Is anyone else seeing this?  Is it new?  Or did some botnet just reach 
>> this corner of the IP space?
>
>I have seen PlanetLab experiments doing this. What are the originating
>IP addresses?

Three observed source addresses

	208.78.169.237
	204.11.51.62
	194.199.24.101

Source ports are high and non-repeating.  Other than the domain root, 
A-record queries for "google.com" and for hostnames which appear to be 
on the same subnet as the querying host.

- -- 
				Jim Wise
				jwise@draga.com
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