Time to get serious about realtime communication

Time to get serious about
realtime communication.
Fall 2013.
oej@edvina.net - @oej
© 2013 Edvina AB, Sollentuna, Sweden. All rights reserved.

Time to get serious about
realtime communication.

I do mean serious.
Seriously.This is important.

Me.
Teacher and
Evangelist.

SIPit
tester.

Co-chair IPv6 wg
SIP Forum

Active in the IETF.

Startup
Mentor.

25 years experience of
Unix and TCP/IP

Asterisk & Kamailio
Developer

Maintainer of
a garden in Sweden.

Consultant for hire.


Realtime: oej@edvina.net * Twitter @oej

Focus.
What’s all of
this about?


Realtime is:


Realtime is:
Here
Now

Together


To do:

A todo-list for everyone working
with IP-based voice, chat,
presence, video, 3d holographic
sessions and ”telephony”.


#1. Deliver what your
users want,
not only what they
ask for.

Lets go back.
Datacom

Telecom

Technology, Business models,
standard development

Lets go back.
Datacom

Telecom

Convergence


Internet
Protocol (IP)

Telephony

You and I.


We gave the world
Asterisk
And they started
using it!

Surprise!

In the bulls-eye
Telco
Business
model
Provider
trust

ISDN
Proprietary
solutions

Asterisk

Open
Source

SIP

Network
security

ISP
Business
model

Asterisk 1.0

Built for a LAN.


Asterisk 1.0
Multiprotocol

PBX
PSTN style audio


Built for a LAN.

For me, every realtime project
today is Internet-facing.

We need to design for
that.

Time to accept the
facts.


Time to accept the
facts.
Asterisk is an Internet Realtime
Communication Platform.
In many places, it’s in the same
place as a Firewall or a session
border controller would be.

But... It’s not designed
that way.

The current trust gap.


The current trust gap.
Our users will never require
secure communication.

They have always
trusted us to
deliver it.

We failed.


Let’s ﬁx this before they

discover

what we did to them.

And promise not to tell anyone.


The tools are there.
TLS and DTLS
Transport Layer Security
SRTP
Secure Realtime Protocol
DNSsec
Secure Domain Name System

Nothing new here,
really.

Let’s start using them.


Let’s start using them.
No, users will still not ask.
Just do it. It enables so much
more.


Two separate issues
ENCRYPTED SESSIONS
Requires more CPU resources to listen in.

AUTHENTICATED ENCRYPTED SESSIONS
Provides conﬁdentiality.

We need more
of both!


Todo #1
1.

Always build secure platforms. Secure all communication.


#2: Stay current.
Please do not fall behind.

Look ma, the net is
growing!
• Internet trafﬁc grows
• Network capacity grows
• Connections over radio networks grow
both in users and usage.

• The number of Internet users and servers
grows more than during the .com period.

HELP!

The tornado
ahead.
The protocols we use are not adapted
to the network the majority use.

Our network will
soon break and be
divided.

The end of the legacy
Internet Protocol
There are no more IPv4
addresses. Prices are going up.
Fixing IPv4 shortage with carrier
grade NAT will be bad for RTC
We spend too much engineering
time keeping IPv4 alive.

We need to ﬁx this.


The cheap and easy
solution.

IPv6

Break the myths.
•
•
•
•
•
•

There’s no other solution.
More NATs are BAD for realtime communication
IPv6 is simple - it’s just an upgrade
IPv6 is used and growing on the net today.
Carriers are investing heavily in IPv6
Adding IPv6 will not raise the costs. For VoIP it will
propably lower the cost.
Don’t fall behind.


Protect your own
career and position.
Learn, lab and have fun with
IPv6 every Friday!

Visit IPv6FRIDAY.ORG and start this Friday!

Come on, it’s 2013
• Adding IPv6 after project launch will add
costs.

• Integrating it from the start will not add a
signiﬁcant cost.

Build for the
current Internet.
Integrate IPv6 now.

Todo #2
1.


2.

Integrate IPv6 in every single project.


#3. We need to
break free.
The PSTN is no longer the common factor.

10 years ago the
Internet and the
LAN was not ready
for realtime
communication.

10 years ago the
Internet and the
LAN was not ready
for realtime
communication.
Times have
changed.

The quality gap.
• Users are used to bad audio. Thank you for
delivering GSM to the masses!

• We use audio tools made for telco
networks on datacom networks.

• There has not been enough focus on

quality built for the network we do have.
Datacom


Telecom

The changing net.
Available bandwidth will
change during a session.
The network may change
during a session.

We can’t assume that IP networks
work like the ISDN network.

Bandwidth is NOT going
down.
• We can deliver stereo. 5-1. More. Better.
• We can automatically adapt to network
feedback

• We can do better than GSM and ULAW/
ALAW

• But we need to adapt - even during a
session.


Let’s hear it from the net.

OPUS


A codec made for the
Internet
OPUS is made by the IETF
by many contributors.
Adapts to the network
during a session.
All sexy codec features
we all dream about.

OPUS

WebRTC leads to SIP
updates
OPUS

Opus may be the biggest
codec used - already.
Bundling SRTP on one port.
ICE updates for dual stacks,
changing networks and IPv6

We need to start
using this. Like
yesterday.

Audio is no longer a
separate application.
”Telephony” was THE app
on the ”Telephony” network.
Now we’re using the Internet
Multimedia becomes one part
of something bigger

WebRTC is not
about VoIP.

Todo #3
1.


2.


3.

Give your users the audio they deserve. Use Opus.


#4: It’s not about
telephony any more.

Questions? Just mail me on
my new e-mail address.
199412129393901@212.3.14.253:27


199412129393901@212.3.14.253:27

What’s wrong
with that?


That’s how you use SIP!

sip:+468964020@192.168.17.12:5060


sip:+468964020@192.168.17.12:5060

Let’s prove that we’re
Internet citizens.


Federate or die.
With security we can
avoid the e-mail SPAM crisis.
Use DNS domain names.

Use e-mail style addressing.


Follow your users.

This is your
communication
address.


This is your
communication
address.
username@domain.tld


Only accept incoming
TLS with client certs.
• When communicating between domains,
require client certs and TLS.

• Set up DNS to reﬂect this (NAPTR, SRV)


What about the phone
number?

It’s just an alias. A
way to reach you on the
old network.


Todo #4
1.


2.


3.


4.

Federate or die. Call using domains.


Let’s start working.
”Look who’s talking??? What are you doing for this?”


@edvina now.
•
•

Co-chair in SIP Forum IPv6 wg

•
•
•
•

Co-author of two IETF drafts on IPv6

Co-author of IETF draft for SIP and DANE/DNSsec
TLS authentication

Operating TLS tests at SIPit
Contributing to Asterisk and Kamailio
Many customer projects building new and cool
platforms


Asterisk patches
• Improve RTCP (ﬁve years jubilee)
• DTMF support enhancements
• RTP QoS enhancements - Packet loss

handling (thanks Martin @voipmonitor)

• PRACK support
• Remote hold support
• SRTP negotiation enhancements
• Much more...


Please test
• Lorenzo Miniero of MeetEcho have a

version of Asterisk with full Opus support

• Digium impeded by US legal system and
patent wars

• The community can start testing and use
this now!

github.com/meetecho/asterisk-opus/

Remember
the 4 to-do’s?


Oh no, you forgot.
Time for an
executive VIP
summary.

Your toolbox
TCP/IP

SIP

WEBRTC

XMPP

TLS

SRTP/DTLS

DANE/DNSsec

The
Community

DNS

A smörgåsbord of fun!

Let’s get serious.
1.

SECURITY:

2.

IPv6:

3.

OPUS:

4.

FEDERATE:


You’re not alone.
• We built Elastix, FreePBX, Asterisk,

FreeSwitch, OpenSIPS and Kamailio
together.

• We built the protocols together.
• Let’s continue together!
• We’re great - the Open Realtime
Community!


Together

A last word.
Let’s try to abandon
proprietary closed
communication networks.


...because realtime is...


...because realtime is...
Here
Now
Together


slideshare.net/oej

Thank you!

Let’s get serious.
1.

SECURITY:

2.

IPv6:

3.

OPUS:

4.

FEDERATE:


Time to get serious about realtime communication

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