So what is IPv6 Anyways, and why Should I care?

TCP/IP is the communication protocol that the internet and most computer networks use. Even a lot of phones use it now. It is basically the language that systems use to talk to each other.

The current version of the protocol that we are using is IPv4. IP stands for “Internet Protocol”, and it is the 4th revision of the language.

Every device connected to the internet has an address so it can be found by other systems. It is called an IP Address.

A sample address is
If you type this address into your web browser you will end up at

One of Google’s several addresses is
Same thing, if you type this in, you end up at Google.

A system exists called DNS that converts these numbered addresses to the more human readable addresses that we are used to using.

When IPv4 was created it allowed for about 4.3 billion addresses. Which seemed a lot at the time, but this was a long time ago, before there were smart phones and internet connected devices, and before many third world countries were starting to hook systems up to the web.

Now, new IPv4 addresses are all but depleted.

IPv6 was created to fix this issue, and to address some of the security issues in IPv4. There are 2^128 IPv6 Addresses, that is, oh roughly:

340,282,366,920,938,463,463,374,607,431,768,211,456 unique IPv6 adresses.
So we shouldn’t be running out anytime soon.

They look something like this:

The problem is that the US is switching to IPv6 very slowly. I believe that we are behind China and Japan in the switchover. And many US companies have no immediate plans to even make the transition. Google currently has a single Linux box set up to handle the IPv6 Google traffic. But eventually we will all be using IPv6.

This is a response that I wrote to a forum question about IPv6 on

3 thoughts on “So what is IPv6 Anyways, and why Should I care?”

  1. What about all the people who had problems with connecting to the net and the first advice they would get is to disable ipv6 , I even read this on a linux help forun about 2 day’s ago I remember trying this years ago but it dident help so I turned it back on but what about the people who just left it off are they all s screwed now

    1. Actually haven’t heard about that. But I have had my share of issues just trying to get an IPv6 website up. Wow, what a royal pain.

      My ISP doesn’t support it yet, no problem. I have an IPv6 compatible router and an IPv6 to IPv4 Tunnel. Well, it seems that my “IPv6 compatible” router will not allow data over certain ports using IPv6 even when the server was placed in the DMZ.

      Crazy, but maybe next year they will get all the kinks out…

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