BCP38 making it work, solving problems

Bora Akyol bora at cisco.com
Tue Oct 12 16:50:55 UTC 2004

On 10/12/04 9:06 AM, "Paul Vixie" <vixie at vix.com> wrote:

>> There is, of course, the issue of multihomed networks, or networks that
>> have satellite connectivity etc emitting spoofed source packets.
> y'know, SAC004 (http://www.icann.org/committees/security/sac004.txt) is
> only four pages long, and one of those is references.  you should read it
> before you call multihomed networks an "issue" wrt BCP38 deployment.  in
> fact, you should read it, and BCP38, and BCP84, before participating in
> this discussion at all, either here, or at the bar-bofs next week.

Excerpt from the text quoted above:

   2.3. For a DDoS attack to succeed more than once, the launch points must
   remain anonymous.  Therefore, forged IP source addresses are used.  From
   the victim's point of view, a DDoS attack seems to come from everywhere
   at once, even from many IP addresses that are unallocated or otherwise

How many people have seen "forged" spoofed IP addresses being used
for DOS attacks lately?


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