] From: John Macdonald <jmm @
] Subject: Re: double reverse lookup
] Date: Mon, 24 Jan 1994 14:07:32 -0500
] It strikes me that using a split DNS and firewall with proxy
] services results in a setup that could ease the upcoming
] problem of the Internet running out of addresses.
] Suppose there were three reserved addresses, one each of type
] A, B, and C. These addresses would be illegal for use on
] any inter-organization connection. Then, most organizations
] could use these network addresses for all of their internal
] operations and simply request a type C for their external
] gateway machines. As long as all external interaction was
] done through proxy services from the gateway, then the only
] organizations that would need a type A or B address would be
] those with many gateways, or those that would/could not set
] up such a proxy service.
This is actively being discussed in the IP Next Generation (IPng) area of
the IETF. I expect that we'll see some form of "reserved for local use"
address space in the near future, both for the proxy use described above
_and_ for organizations that are certain that they'll never connect to the
Internet... (Of course, I've seen several such organizations subsequently
change their mind, and that's a strong argument against "local use" addresses)
Also, it would not be necessary to reserve more than one local-use network,
as folks could always use less than the entire reserved space via subnetting.