World IPv6 Launch is June 6th 2012

World IPv6 Launch is June 6th 2012

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August 2011
When you enter a hostname (like "www.chaosreigns.com") in your web browser, it gets converted to an IP (Internet Protocol) version 4 address (like "") for use by the computers involved.

We're running out of them.

IANA allocates IP addresses to five Regional Internet Registries. IANA ran out of version 4 addresses on January 31 2011. The first RIR to run out was APNIC (Asia-Pacific Network Information Centre) on April 15 2011. The other four have not yet run out, but some, like ARIN (American Registry for Internet Numbers) have begun restricting availability.

So it's becoming increasingly important to get everyone on IPv6 so that people who can only get IPv6 addresses are easily reachable by everyone else. So on June 8 2011, there was a global IPv6 test day. This June, it's being turned on and left on.

IPv4 has about 232 addresses. IPv6 has about 2128 addresses (more than the number of atoms in the observable universe, as [info]woodwardiocom pointed out last year).
IPv4: 4294967296
IPv6: 340282366920938463463374607431768211456

You can check to see if you have access ot IPv6 hosts at http://test-ipv6.com/

Last night I switched my server from using an IPv6 tunnel to native IPv6 (because http://www.linode.com is an awesome provider).

My IPv4 address:
My IPv6 address: 2600:3c01::f03c:91ff:fe96:340b

Comcast is providing 6to4 gateways, a kind of IPv6 encapsulation. A few ways to enable it under Linux:
Note: If you're using ufw prior to version 0.30.1-2 you need to enable IPv6 in /etc/default/ufw.

More info:
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