[address-policy-wg] PI for Not-DNS Anycast.

On Thu, 14 Jun 2007, Gert Doering wrote:

> Hi,
>
> On Wed, Jun 13, 2007 at 10:53:01AM +0200, Mikael Abrahamsson wrote:
>> IRC uses a single TCP session and several IRC networks have deployed
>> anycast as a way to limit amount of clients that can potentially ddos a
>> single server.
>
> Can you point me to some documentation for that?   Or some prefixes that
> have been used for anycasting IRC servers?
>
> I'm really curious how well that works.

194.68.45.0/24.

Afaik there are no official documentation. I ran an EFnet irc-server off 
of a similar /24 for a couple of years and it worked very well. We only 
announced it to peering partners in scandinavia though, so it was quite 
limited in announcement.

Solved the ddos problem very nicely back then, though. What you cannot 
reach you cannot ddos.

-- 
Mikael Abrahamsson    email: swmike at swm.pp.se