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You can install the Kurento Media server with using our Kurento installation guide. To make Kurento work perfectly behind NATs, you need a Turn server. Coturn is an opensource turn server. We can easily setup Coturn on Ubuntu 16.04 (Xenial) with official Coturn repo.

Firewall Rules

First Make sure that you have opened up following ports in your firewall

3478 : UDP
49152–65535 : UDP

If you are installing Coturn on the same box as Kurento, you have to open additional ports for Kurento as well

Installing Coturn

Login to Ubuntu shell and enter following command to install Coturn

sudo apt-get -y update
sudo apt-get -y install coturn

Start the Kurento Daemon at Startup

To setup kurento start at system startup

sudo vim /etc/default/coturn

Uncomment the following line by removing the # at the beginning to run Coturn as an automatic system service daemon

TURNSERVER_ENABLED=1

Creating a User

With the Configuration File

This method should work with most of the versions of Coturn. Open (or create) /etc/turnserver.conf file and past the following content. Replace <YOUR_USERNAME>, <YOUR_PASSWORD> and <YOUR_PUBLIC_IP_ADDRESS> values with your own ones.

fingerprint
user=<YOUR_USERNAME>:<YOUR_PASSWORD>
lt-cred-mech
realm=kurento.org
log-file=/var/log/turnserver/turnserver.log
simple-log
external-ip=<YOUR_PUBLIC_IP_ADDRESS>

Now restart the coturn service

sudo service coturn restart

With Turn Admin (Quick and Easy)

By default, coturn is configured to use an sqllite database. We can create a user in the database using the utility called turnadmin that comes with coturn.

to create a user with turnadmin use following command

turnadmin -k -u <YOUR_USERNAME> -p <YOUR_PASSWORD> -r <REALM>

For an example

turnadmin -k -u meetrix -p 1234 -r meetrix.io

Testing

Go to trickle-ice page and enter following details.

STUN or TURN URI : turn:<YOUR_PUBLIC_IP_ADDRESS>:3478
TURN username: <YOUR_USERNAME>
TURN password: <YOUR_PASSWORD>

Then click Add Server and then Gather candidates button. If you have done everything correctly, you should see Done as the final result. If you do not get any response or if you see any error messages, please double check if you have followed this guide as it is.

Configuring Kurento

open /etc/kurento/modules/kurento/WebRtcEndpoint.conf.ini. Remove everything and add following line

turnURL=<YOUR_USERNAME>:<YOUR_PASSWORD>@<YOUR_PUBLIC_IP_ADDRESS>:3478

Now restart Kurento Media Server

sudo service kurento-media-server restart

That’s it !

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