Want to learn Kamailio? Join us in Miami, FL, after Easter!

oej  2016-02-19

March 28th we’re running the SIP Masterclass in Miami, Florida with our partner USA-VOIP. This is an updated version of the class, now including an introduction to SIP over WebRTC. Spend one week with Olle E. Johansson and learn more about the SIP protocol, get an introduction to Kamailio with tutorials and interactive labs!

The SIP Masterclass has been running for many years and is one of the premium trainings in Kamailio – the leading Open Source SIP Server. Kamailio can be configured as a SIP Proxy, an application server, webrtc gateway, SBC and much, much more.

There are limited seats available, so make sure you register early! Read more about this event on the USA-VOIP web server and contact them for details and early-bird pricing!

What’s Happening with SIP and IPv6?

oej  2015-04-06

At the recent Netnod Spring Meeting Olle E. Johansson from Edvina was invited to talk about his work with dual stacks in SIP. The talk was very personal and covered the progress, or lack of progress, in the IETF and the work done in the SIP Forum IPv6 working group.

Stay Connected - discover IPv6 and SIP!The work started when Olle detected strange issues when testing the IPv6 implementation in Asterisk. It wasn’t the code, it was something else. After testing IPv6 at the SIPit events, work started in a working group of the SIP forum that later resulted in documents contributed to the IETF – one issue was adopted by the IETF  SIPcore working group but is not seeing any interest so it doesn’t move forward. In the IETF, strange resistance was met and not much support for doing any changes or additions to the protocols in order to fix proven problems. In fact, quite a surprising opposition was met.

How do you fix issues in an old protocol?

Should it really be this hard to fix issues in a published protocol? Are SIP and HTTP the only protocols that have issues with dual stacks or is it just the two protocols that have been tested in detail?

Further tests at SIPit has not only confirmed the documented issues, but also revealed issues in many implementations that has been supporting IPv6 for a long time.  Source address selection was missing. There’s a lot of work to do before we can get SIP implementations  ready for dual stack use, both in development and in the standards.

The presentation is available on slideshare. We apologise that it is made for live presentation and doesn’t cover all the details on the actual slides, but it may still give some interesting facts.


2015 update: SIP and IPv6 issues – staying Happy in SIP from Olle E Johansson

Learn Kamailio in Barcelona – June 29 – July 3rd

oej  2015-04-04

Want to learn Kamailio? Register today for the Edvina SIP Masterclass in Sitges near Barcelona this summer! This year, we’re outside of Barcelona in the city of Sitges. 

This is the basic class that go through both SIP and Kamailio – in theory and with many labs. All you need is a laptop with a Linux virtual machine and energy for five days of training with Olle E. Johansson.

This is a unique class where you learn how to build a scalable SIP platforms and how to integrate media servers and PBXs like Asterisk or FreeSwitch into your service.

Olle has many years of experience with both Asterisk and Kamailio. He’s been a developer for over 10 years and have done trainings for a longer time in various topics. He founded the Asterisk trainings, wrote the dCAP and co-founded the Astricon conference. He’s a regular speaker in many conferences around the world, as well as in local geek meetings in Sweden. His SIP Masterclasses have been running for a long time and keep changing based on the development of the protocols and the products involved.

partner-avanzada7This class is hosted by Avanzada 7 in cooperation with Edvina. Contact us today to book your seat!



TLS-O-MATIC :: Test your applications!

oej  2015-03-06

Edvina yesterday evening launched the TLS-O-MATICTLS-O-MATIC test site for applications. For many years, Olle E. Johansson has been operating a TLS-O-MATIC for SIP applications at the SIPit event organised by the SIP forum. The new TLS-O-MATIC is a public service launches with more than 15 tests for the HTTPS protocol. Tests for SIP will be added later.

TLS-O-MATIC has tests for all kinds of problems with certificate and host validation in TLS.

-“When you develop an application it’s easy to test success cases. It’s even more important to test failure cases – especially when it comes to TLS. There are a lot of API’s depending upon TLS for confidentiality, integrity and authentication. TLS-O-MATIC.com provides a test bed for these.” says Olle.

TLS-O-MATIC was launched at the #MoreCrypto Meetup in Stockholm yesterday as a joint presentation by Olle and Daniel Stenberg, Mozilla. Daniel is the developer of Curl and LibCurl. During the presentation, Daniel used Curl to run through the first ten tests.

All the scripts and configurations used to produce the tests are published on Github for review, forking and possible setup in internal labs. Edvina has a tradition of working with open standards and open source, so publishing the Tls-o-matic source on Github is a natural thing to do for us. We have already received the first bug report!

Go to the web site today and learn more about TLS!

Launching the new SIP Masterclass 2 – Mastering Kamailio

oej  2015-02-07

Come to Stockholm, Sweden April 7-20, 2015 for the very first “Mastering Kamailio” class!

After more than 10 years of running the SIP Masterclass we had too much material and too many ideas to fit into five days of training. Students attending our SIP Masterclass got a chock when seeing the material – over 1000 powerpoint slides printed in a binder that was propably causing back pain problems when being carried home. We wanted to say so much, to share our knowledge.

This winter we decided to do something about it. We wanted a class that focus more on Kamailio. To get started, one needs to learn SIP so the SIP Masterclass still starts with a lot of SIP tutorials. Without this, students would get nowhere in Kamailio. The solution? We split the class in two. Part one is the same, we just made the binder a bit easier to carry and only print the material that we actually cover in the class. Part two is the exciting news.

Launching SIP Masterclass 2 – Mastering Kamailio

sipmasterclass-2The SIP Masterclass 2 – Mastering Kamailio – is our new class. Four days of labs and tutorials. This is a perfect class for all the students that have been attending our SIP Masterclass during all these years – in the US, in Sweden, England or Spain.

This class assumes you have been running Kamailio, but never got around to learning the more advanced modules, how to do more than load balance a set of PBXs or handle SIP trunks.

In this class we cover dual stack use, security, SIP trunking, WebRTC and much more. We will build stress tests and functionality tests that you can continue to build on at home. We will run thousands of calls in various modes, make things break and learn to debug our platforms.

Kamailio has over 100 modules, so we can’t cover all of them, but we will use combinations of them to build new solutions and you will learn how to use the SIP protocol on a new level.

The adventure starts in Stockholm, Sweden in April

This will be fun. We run the first class in Stockholm after easter – April 7-10. Since this is the launch of this new training and we have so much we want to do, it will not be a perfect class. Labs may not work smoothly, there will be typos on the slides, slides may be out of order (things you notice when you run for the first time). One thing is for sure though – you will learn a lot during this class.

In order to get some guineapigs first time SIP MASTERS for this first class, we have lowered the price. This class will normally cost 2.600 Euro ex VAT. If you register early for the very first SIP Masterclass 2 – Mastering Kamailio in Stockholm you can attend for 1.950 Euro ex VAT!
Register today by sending e-mail to info@edvina.net !

Looking forward to seeing you in Stockholm!


/OlleOlle E. Johansson

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