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Category: IPv6

How to represent an IPv6 address properly

There are a number of RFC’s on this but the most recent, 5952, is the one that should be honored at this point.  Here’s a breakdown of what you should Continue Reading…

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Statically configuring IPv6 address & gateway on CentOS/RHEL

By default RHEL/CentOS 5 and 6 have SLAAC enabled, to automatically configure IPv6 addresses if a router advertisement is received on an interface.  I find this VERY undesirable on a Continue Reading…

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Disabling IPv6 on CentOS

I’ve seen a number of online articles on disabling IPv6 and they often involve blacklisting kernel modules, etc. which is a really bad idea.  In most cases it does not Continue Reading…

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Create IPv6 addresses (based on IPv4) on a Plesk server

This is a perl script that I wrote to add IPv6 addresses to a pre-existing Plesk server that is already up and running with IPv4 services.  The script is based Continue Reading…

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IPv6 addressing scheme for existing IPv4 network

A lot of enterprises and hosting providers are getting into IPv6 finally and ideally are running dual-stack so they can offer their users/clients native IPv4 and IPv6.  If you’re retroactively Continue Reading…

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Howto: IPv6 at your house/office when your ISP sucks

This article includes: Background on why you might need to deal with IPv6 tunneling (basically when your ISP sucks) Prerequisites for adding your own home IPv6 service Setting up IPv6 Continue Reading…

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Trouble with OSPFv3 between Brocade & Cisco

Note: in my articles, any time I give a config example, parts you need to replace *should* be in red text. Here’s the CliffsNotes version of this article for those Continue Reading…

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How to disable IPv6 stateless autoconfig on Windows 7

For some reason, even if you statically assign an IPv6 address and gateway in Windows 7, it will still do SLAAC anyway and give itself a second auto generated address.  Continue Reading…

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An IPv6 discard prefix; who knew?!

Found out about this very recently when trying to work on a new blackhole route server; apparently in August 2012 a new RFC, 6666, was published specifically to define a Continue Reading…

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IPv6-enabled VPS hosting

So I was recently trying to find hosting for what was going to become this website.  I wanted to avoid shared because I like to have control over the server Continue Reading…

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