Re: UDP Amplification DDoS - Help!

[Andrew Kirch <trelane () trelane net>]

use a CDN provider or AWS ELBs or something to absorb the attacks?

On Mon, Feb 8, 2016 at 9:55 PM, Faisal Imtiaz <faisal () snappytelecom net> wrote:
> Not quite sure what kind of info / confirmation you are looking for...
>
> There are lots of articles (do a google search) on this topic as well as mitigation ...
>
> e.g.
>
> http://blog.nexusguard.com/ssdp-ddos-attacks/
>
> &
> https://tools.ietf.org/html/bcp38
>
> Regards
>
> Faisal Imtiaz
> Snappy Internet & Telecom
>
> ----- Original Message -----
> > From: "Mitch Dyer" <mdyer () development-group net>
> > To: "nanog list" <nanog () nanog org>
> > Sent: Monday, February 8, 2016 6:14:06 PM
> > Subject: UDP Amplification DDoS - Help!
>
> > Hello,
> >
> > Hoping someone can point me in the right direction here, even just confirming my
> > suspicions would be incredibly helpful.
> >
> > A little bit of background: I have a customer I'm working with that is
> > downstream of a 1Gb link that is experiencing multiple DDoS attacks on a daily
> > basis. Through several captures I've seen what appear to be a mixture of SSDP
> > and DNS amplification attacks (though not at the same time). The attack itself
> > seems to target the PAT address associated with a specific site, if we change
> > the PAT address for the site, the attack targets the new address at the next
> > occurance. We've tried setting up captures and logging inside the network to
> > determine if the SSDP/DNS request originate within the network but that does
> > not appear to be the case.
> >
> > We've reached out for some assistance from the upstream carrier but they've only
> > been able to enforce a 24-hour block.
> >
> > I'm hoping someone with some experience on this topic would be able to shed some
> > light on a better way to attack this or would be willing to confirm that we are
> > simply SOL without prolonged assistance from the upstream carrier.
> >
> > Thanks in advance for any insight.
> >
> > Mitch