Tag: Slides

Slides: IPv6 and Telecom – IPv4 Is FInally Running Out. Now What?

What is the impact of IPv6 on telecommunications, including Voice-over-IP (VoIP) and Unified Communications (UC)?  I recently presented in a webinar for US Telecom on exactly that topic – and my slides for the session are now available:

The webinar was recorded and I’m told that if you register you can view the archive of the session.  There were some excellent questions asked at the end that you can hear through the recording.

As more of the Internet moves to IPv6, it’s definitely important for telecommunications to work over IPv6 – to help with that we are continuing to compile a list of resources related to IPv6 and VoIP/UC/telecom.  Please do check the list out – and also please let us know of any additional resources we should add!

If you are looking to get started with IPv6, please do check out our “Start Here” pages where you can find resources relating to your type of company or organization.

Comments? Olle’s Thoughts on SIP (VoIP) and DNSSEC / DANE

How you you think DNSSEC and specifically DANE could be used with the Session Initiation Protocol (SIP) to provide an added layer of security to voice / video communications over IP? (a.k.a. “VoIP”)   I started raising this question back in a presentation at SIPNOC 2013 and again in a recent VUC interview about DNSSEC and VoIP, but today to my delight Olle Johansson dove a bit deeper with a set of slides about SIP and DNSSEC / DANE he posted up on SlideShare. These are just his “brainstorming” a bit about how DNSSEC/DANE could work with SIP – and he has posted them for comment and feedback:

I like that he went deeper than I had done into precisely where in the SIP interactions DNSSEC / DANE could play a role.  Olle is definitely looking for comment which you can leave in many different places (such as SlideShare, this blog post, anywhere it’s posted on social networks) or can send directly to Olle or send out on the DANE working group mailing list.

I’m pleased to see the continued evolution of this discussion… and I look forward to seeing more work happen in this space.  (Note that I’ve set up a page here about DNSSEC and VoIP to track where some of this work is happening (and am always looking for items to add).)

Slides – Adding DNSSEC to Fedora and Red Hat Linux

What is the status of DNSSEC being added to Fedora and Red Hat Linux?  What changes have already been made?  What changes will occur in the future?  What tools are available to help?

At the recent ICANN45 DNSSEC Deployment Workshop, Paul Wouters from Red Hat spoke about integrating DNSSEC into Linux. Paul’s slides are available for download and a video of the entire workshop is available from the main page.

Paul Wouters presentation on DNSSEC in Linux

In the presentation, Paul talks about the difference between Fedora and Red Hat Linux and then dives into what needed to be modified to support DNSSEC. He provides some insight into their experiences using DNSSEC in different configurations and with different tools.

Paul also spoke about support for the DANE protocol to use DNSSEC to validate SSL/TLS certificates and in particular his TLSA Validator add-on for the Firefox browser and his “hash-slinger” tool that generates TLSA records.  Both tools are available at his site at:


It was a great presentation to hear, and Paul is very active within the DNSSEC community working on tools such as these to help get DNSSEC further deployed. It is well worth some time checking out his tools.

Slides: SIP and IPv6 – Can They Get Along?

Last week at the SIPNOC 2012 event in Virginia, I gave a presentation about how the Session Initiation Protocol (SIP) can work with IPv6 and what some of the issues are around deployment.  I emphasized the fact that SIP works over IPv6 and then took a step back to talk about the basics of IPv6 before diving into more SIP- and VoIP-specific issues.  There was some great discussion and I learned later that a number of people took photos of my slide about SIP and NAT. :-)

To that end, my slides about SIP and IPv6 are now available online for your viewing and/or downloading.  I did record the event on video – and at some point here I’m aiming to publish that to our YouTube account.  Meanwhile, enjoy the slides…

SIP and IPv6 – Can They Get Along?

View more presentations from Deploy360

Slides: The Case For IPv6-Only Data Centers

Why don’t we just skip dual-stack and other transition technologies and jump straight to IPv6-only data centers that use a gateway/proxy server to service IPv4 requests? That’s the fundamental question Tore Anderson posed in his presentation to the V6 World Congress last week in Paris: “The Case For IPv6-Only Data Centers” (PDF). Here’s what was for me the key slide:

Tore goes on to explain how this can be done using Stateless IP/ICMP Translation (SIIT), also known as “Stateless NAT64″ and “IVI” and defined in RFC 6052 and RFC 6145. Through a series of examples and diagrams he shows how IPv4 traffic would pass through the SIIT gateways into the IPv6 data center and then back out again.  He explains the advantages of this setup and concludes with a configuration example and remarks that he’s using this exact setup for his own website and that of his employer.

It’s certainly an intriguing approach and I’m now thinking I may work on setting this up in my IPv6 lab I’m working on.

What do you think?  Do you like the idea of just migrating once to an IPv6-only data center?

Slides: Node.js, Event Loops and How To Stop Writing Spaghetti Code

As a comment to my recent post on understanding event-driven programming, Tom Hughes-Croucher left a pointer over to a presentation he gave last year about Node.js and event-driven programming. I enjoyed his style and would have liked to hear him give it in person… here it is embedded for anyone else looking to understand more on Node.js and the world of the Event Loop: