On Wed, 09 Feb 2011 18:47:34 -0500, George Bonser <gbon...@seven.com>
wrote:
In other words, the broadband provider provides a single global IP to
the "always up" CPE. That CPE does DHCP to user stations and hands out
1918 addresses and NATs them to the single global IP.
Correct. The distinction you seem unware of (or unwilling to accept) is
that the ISP did not assign you a private address. Your CPE did. The ISP
gave you a single public IPv4 address. With the notable exception of
Uverse, you can put that address on any device you want. But you only
have the one public address, so you'll have to resort to NAT inside your
network to support more than one machine. (DSL and cable modems can be set
to pure bridged mode, thus turning off their routing/NAT engine. You
cannot do that with Uverse due to their authentication method.)
This is *very* different from the ISP doing the NAT... one device doing
NAT for thousands of customers, vs. a device in the customer's hands doing
the NAT.
I have yet to see a broadband provider that configures a network so that
individual nodes in the home network get global IPs.
Open your eyes. Many cable networks will sell you access to more than one
address -- TW (RR) has done this for over a decade. AT&T Uverse will
provide a /29 for free.
--Ricky
