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Re: Using unallocated address space - for DoS?

  • From: Steven M. Bellovin
  • Date: Wed Feb 14 09:29:35 2001

In message <20010214215512.A19817@mail.q-linux.com>, "Miguel A.L. Paraz" writes
:
>
>On Tue, Feb 13, 2001 at 09:47:15PM -0800, Sean Donelan wrote:
>> Unfortunately this is not a unique occurance.  Cable&Wireless, Sprint,
>> AT&T and UUNET have all had portions of their service knocked off the
>> Internet for various periods of time due to bogus announcements.  Until
>> other ISPs fix their policies, I can knock your network off most of the
>> Internet, and there is nothing you can do to prevent it.
>
>
>I hope this is a remote possibility, but what are the chances of someone
>malicious breaking into the "right" router and blackholing the worst possible
>networks?  If this is done, how long till it can be remedied?

You don't have to break into the "right" router; you just have to start 
announcing the networks in a way that your peers don't -- can't -- 
detect is improper.

		--Steve Bellovin, http://www.research.att.com/~smb







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