North American Network Operators Group
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Re: Blackhole Routes

  • From: Stephen J. Wilcox
  • Date: Thu Sep 30 05:15:52 2004 
There are several sources of eBGP feeds for blackholing, they can be very useful 
depending on what your requirements are. You can get feeds for spam, ddos bots, 
bogon routes etc

For iBGP this can be useful too, if you are being DDoS'd you can inject an iBGP 
route and have all your routers instantly blackhole traffic at your edge instead 
of having to static config all of them..

regards
Steve

On Thu, 30 Sep 2004, Abhishek Verma wrote:

> 
> Hi,
> 
> There are ways to add static routes that can be blackholed. I can
> understand the utility of such routes if those are installed in my
> forwarding table. What bewilders me is why would anyone want to
> advertise "blackhole" routes using say, BGP?
> 
> Is it only to prevent some sort of DoS attacks or are there other uses
> also of advertising black hole routes?
> 
> Thanks,
> Abhishek
> 
> --
> Class of 2004
> Institute of Technology, BHU
> Varanasi, India
>