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- Integrating Asterisk and Ekiga.net
*Asterisk*  is an open source telephone switch (PBX). Although it can be
used in complex environments, it can also be deployed for simple home use.
I was planning on Describing the set up and configuration for my Asterisk
server, but I found that there are many good tutorials that already cover the
general steps. For example, this one from our fellow KWLUGer and Linux
trainer extraordinaire rpjday
Normaly you use Asterisk with a telephony provider such as *Unlimitel* ,
*Voip.ms* , *MyDivert.com*  and many others; from which you can get a
real telephone number.
*Ekiga.net*  is a free VoIP provider. It does not give you a phone number,
but an account name. Very similar to MSN Messenger or Yahoo Messenger or
Skype, the main difference is that you can associate that account with your
Asterisk phone system.
I know that we enjoy being in front of our computers all day, but, when we
are away from the computer, it is quite convenient to have the phone ring and
receive an ekiga call even when the computer is turned off.
*Ekiga*  is also the name of a free Softphone application provided by
Ekiga.net and available in the repositories of most Linux distributions.
There is also a Windows version for those friends and family which you
haven't converted. During the set-up it will allow them to create a new ekiga
So assuming that you have an Asterisk server installed and you are able to
call from extension to extension inside your network, I'll proceed to explain
the simple steps to integrate with Ekiga.net
First, Here is my target physical architecture for this simple configuration:
While the Ekiga Wiki has good information regarding the integration, It
assumes an Internet facing server. If your Asterisk server faces the
internet, just follow the instructions. If like me, your server is behind a
firewall, you'll need some extra steps.
Ekiga as an Asterisk client explains how to use Ekiga as a SoftPhone (phone
extension) registered to your Asterisk Server. I
There is no problems with these instructions. Just follow them
Connecting Asterisk to ekiga.net explains how to configure Asterisk to send
and receive calls through the Ekiga network
Given that my server is behind a firewall as you can see in the diagram, and
that I do not have a static IP; after following those instructions I had to
do the corresponding adjustments to *sip.conf*
*No Static IP, server Behind a firewal*
To overcome this problem I registered for a free DNS name at
, this way even when my IP address changes I still have the same domain name.
Most routers these days have an option to configure a DynDNS account. If
that's not your case, you can still run a daemon on the server that will
synchronize your IP address and domain name at regular intervals.
Once I had my DynDNS I added the following lines to the [general] section of
*sip.conf* as explained at voip-info.org 
externip=<my dynDNS domain name>
localnet=<IP base for my network>/255.255.255.0
and added the following line to the [ekiga] section of *sip.conf*
I restarted Asterisk
$ sudo /etc/init.d/asterisk restert
*Firewall port forwarding*
The final step is to forward UDP ports 5000 - 5100 on your firewall to go to
your Asterisk server.
And that is it, you will be able to send and receive calls to and from other
Ekiga users, just don't forget to use the corresponding prefix. (e.g. 9 in
Read more http://kwlug.org/node/811
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