Dec 08 2013

Convert an IPv4 to a 6to4 Address

Well, I’m still trying to work out how to get a 6to4 tunnel going on my home internet connection but I think I am slowly piecing things together.

It seems you need to use the anycast address of 192.88.99.1 which is where IPv6 traffic will be forwarded over IPv4 but you need to covert your IPv4 address into an IPv6 address so it is able to be routed back to you via 192.88.99.1.

So how do you calculate it?

The easy way is to use the calculator at Grox – just choose IPv4 to 6to4 Address in the drop down list and put in your public IP address (it should be in yellow at the top of the page). Copy and paste it in and click the Calculate button to get your converted IPv6 address.

Otherwise, you can manually convert your IP address from decimal to hexadecimal and construct your IPv6 address that way. You can use the calculator application in Windows in Programmer mode for this purpose, just make sure you type in your numbers in decimcal mode and then select the option for Hex after each number entry.

For example:

  • For an IP address of 9.10.11.12 (WW.XX.YY.ZZ) your IPv6 address becomes 2002:WWXX:YYZZ::
  • 9.10.11.12 becomes 090a:0b0c (or just 90a:b0c as you can drop the leading zero),
  • This creates an IPv6 address of 2002:090a:0b0c:: or 2002:90a:b0c::

I’m sure I will work this out slowly but surely and once I do I will share this with everyone.

Boydo

My name is Boyd and I’m a Service Management Specialist with a knack for operational data gathering, transformation, analysis and reporting.

In 2012, I obtained my Masters of Science in Information Technology through the University of New South Wales @ The Australia Defence Force Academy (UNSW@ADFA).

I was also part of an online community known as the Panasonic Insider Crew in the capacity of “Insider Guru” for Panasonic Australia where I interacted with other tech enthusiasts and find out more about Panasonic's latest gadgets.

I love technology, gadgets, and the Internet and maintain a keen interest in these areas locally, nationally, and globally. I hope by sharing my views on these topics that people will receive an honest point of view from someone with a genuine interest in these topics.

I have also written and edited articles for Neowin - you can check out my articles over @ https://www.neowin.net/news/poster/boyd_chan

I hope you enjoy reading my blog!

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