[CentOS] IPV4 is nearly depleted, are you ready for IPV6?

[Todd Rinaldo]

On Dec 6, 2010, at 6:57 PM, David wrote:

> 3) When I connect my IPV6 refrigerator with its automatic inventory 
> system tracking every RFID-enabled carrot I use, won't I be making my 
> shopping habits visible to all those annoying advertisers?  Or, in 
> other words, am I compromising my privacy?  Actually, although such 
> dissemination of information can be blocked by a correctly designed 
> firewall, I suspect the "Free IPv6 DSL Modem and Router, Sponsored by 
> <your-favorite-commercial-site>" that comes with your ISP contract, 
> would err on the side of promiscuity.

Set your refrigerator to fe80:0001:: and it's now only accessible on the local subnet.

Quoting http://www.litech.org/~jeff/private/ipv6primer/html/

Two prefixes are set aside for link-local and site-local addresses. Link-local addresses, in prefix fe80::/64, are valid and unique only on the local network directly connected to each interface card (usually the local Ethernet segment) and are never routed. They are automatically assigned to every interface and are primarily used to obtain configuration information. Site-local addresses, in prefix fec0::/48, may be used however a site sees fit, and the IP addresses may be assigned to networks just like any global address allocation. Site-local addresses are never routed onto the Internet.


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