Re: Large number of DNS probes in last 24 hours

[Jim Wise <jwise () 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 against unpublished non-recursive DNS servers in the last 24 hours or 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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