Using IPv6 to Defeat Multi-tenancy Separation

I’ve always advised my clients to  carefully plan the implementation of IPv6. The protocol opens new attack vectors on which … [Read more...]

IPv6 Networking Detection Case #141 – Part 2: The Solution


Part 2: The Solution Ready for part 2? Have you read part 1 w/ the facts and clues?  If not, go read that now before you … [Read more...]

IPv6 Networking Detection Case #141 – Part 1: The Facts and Clues


Part #1 - I give you the facts and the clues. Part #2 - I give you what the problem ended up being. Ready to play? This is … [Read more...]

Windows ISATAP Client, Part 3


In Part 2 we did the initial ISATAP configuration for our Cisco router. Here we’ll show the config we use on our Windows … [Read more...]

Windows ISATAP Client, Part 2


In Part 1 we discussed how to turn off ISATAP on Windows host—which is a great idea.  Turning off unnecessary components of … [Read more...]

IPv6 at Home – Prefix Delegation

IPv6 Summit Swag

As many of you may know, I used to move packets around for a living.  I'm not doing that any more, but I'm still … [Read more...]

Windows ISATAP Client, Part 1

Last month I had the opportunity to work with a company to perform an IPv6 pilot.  There are a lot of elements to light up … [Read more...]

When Good NICs Do Bad Things: A Blast of IPv6 Multicast Listener Discovery Queries

This is the write-up of a recent event we experienced on our network.  This will be combination of a  journal of symptoms, … [Read more...]

On Link in IPv6

As an avid reader of RFCs and RFC drafts, I'm always running across little bits of knowledge I either already knew and forgot … [Read more...]

The Cost of IPv6 on Amazon Web Services

AWS is a great platform for businesses that have the technical savvy to administer servers and applications but do not want … [Read more...]

Why Should I Consider IPv6 – Part 2

In Part 1 of this series, we discussed what's wrong with IPv4. Looking at our roadmap again, let's move to the next part of … [Read more...]

Why Should I Consider IPv6?

Network Overlap

A lot of people are talking about IPv6, but I'm using IPv4 and quite content. I have plenty of public addresses. As long as … [Read more...]

In the Lab: Review a few IPv6 Routing Protocols and Encapsulating v6 in v4


I have pseudo-learned and forgotten some IPv6 mechanics over the past couple of years. I have re-visited this cycle recently, … [Read more...]

Unexpected OSPFv3 Virtual-Link Behavior


I came across an interesting question in the Cisco Learning Network forums a couple of weeks ago about OSPFv3 virtual-link … [Read more...]

(Some) Vendors Dig IPv6

Now that World IPv6 Launch is behind us, let's look into how a sampling of network hardware vendors support IPv6 on their web … [Read more...]