6to4 address calculator

we'll be needing this sooner than later since The last IPv4 address blocks allocated

That's right kids, they just used up all the ipv4 address blocks, more or less, so now it's time to start the big ip v4 to ip v6 switch.

ip v6 addresses will be 64 bit, ipv4 addresses were 32 bit, which means about 4 billion possible addresses, give or take.
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IPv6 intro creates spam-filtering nightmare

Article on IPv6 breaking filter rules. I can just see the spammers of the world rubbing their hands in glee as they get massive new pools of IP addresses to use.
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hak5 Episode 812 – Toorcon San Diego 2010 Part 1: IPv6
hak5 Episode 812 – Toorcon San Diego 2010 Part 2: IPv6

download hak5 video episodes directly
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And for those of you with Android phones, there is a Hak5 app that works nice to view those videos.
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