North American Network Operators Group
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Re: Get as much IP space as you ever dreamed of, was: Re: Looking to buy IPv4 addresses from class C swamp

  • From: Jack Bates
  • Date: Tue Apr 29 00:08:43 2003 
Kai Schlichting wrote:

An example covering this exact case: 9.0.0.0/8 is such a space, owned by IBM.

Some illicit use documented at www.ris.ripe.net :

9.184.112.0/20
9.186.144.0/20 , both from AS 3786 (dacom.co.kr, bora.net) , since at
least 2002/12/26.

IBM confirmed the bogosity of these announcements on 04/07, the routes
got withdrawn on 04/14.
Actually, IBM confirmed that any announcements from 9/8 were guaranteed to be bogus. IBM uses 9/8 internally. They use NAT to convert 9/8 addresses back to routed addresses. One can imagine that IBM has a large internal network globally with interconnects to various partners. Yet many companies have found that utilization of NAT when communicating with the public networks is a sound addition to security.

Private peering follows different rulesets than public. Many respectable organizations still don't understand that you can Peer privately without exporting each others advertisements in order to save expenditures to third parties when transiting traffic between the two networks. Security percautions are also treated different. What you would offer a partner sometimes exceeds the access you'd allow the public.

While there are benefits to registering space that isn't routed on the public network, such space needs to be declared as such. Until that time, people will continue to hijack those networks and use them for their own ends.

-Jack