Re: chargen is the new DDoS tool?

[Leo Bicknell <bicknell () ufp org>]

On Jun 11, 2013, at 10:39 AM, Bernhard Schmidt <berni () birkenwald de> wrote:

> This seems to be something new. There aren't a lot of systems in our
> network responding to chargen, but those that do have a 15x
> amplification factor and generate more traffic than we have seen with
> abused open resolvers.

The number is non-zero?  In 2013?

While blocking it at your border is probably a fine way of mitigating the problem, I would recommend doing an internal 
nmap scan for such things, finding the systems that respond, and talking with their owners.

Please report back to NANOG after talking to them letting us know if the owners were still using SunOS 4.x boxes for 
some reason, had accidentally enabled chargen, or if some malware had set up the servers.  Inquiring minds would like 
to know!

-- 
       Leo Bicknell - bicknell () ufp org - CCIE 3440
        PGP keys at http://www.ufp.org/~bicknell/

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