Re: Single and Double flux DNS activity detection and prevention

["john lokka" <merigoth () gmail com>]

I deal in IDS'es more than IPSes. So,  I feel the domain blocks would
be better suited for the dns server rather than the IPS. Although I
imagine they could work equally well on an IPS. Still, I don't know if
there are generic signature detection of fast-flux networks for
IDS/IPS systems.

I attended a brief at NDSS on fast-flux detection methods. The
research presented was new and wasn't able to be automated. The
presented research was an initial framework. So, it was a started to
automating the process.

I wish I had more time to invest towards this problem, because I
believe it is an excellent and difficult one to solve. If anyone is
working on this problem, I'd be interested.

John Lokka

On Mon, May 5, 2008 at 6:28 PM, Ravi Chunduru
<ravi.is.chunduru () gmail com> wrote:
> What are the mechanisms to prevent users from visiting malware sites
> even when Single/Double flux methods are used?  I am using snort
> inline IPS.
>
> I had gone through http://www.honeynet.org/papers/ff/fast-flux.html
> and http://netsecinfo.blogspot.com/2008/04/botnets-using-fast-flux-and-double-flux.html.
>
> One of the mitigation technique mentioned is to apply domain block
> list.  I feel that domain name based block list is CPU intensive.  Are
> there any other simple methods?
>
> Thanks
> Ravi
>
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