How to Install Kamailio on nixOS Latest

Kamailio is an open-source SIP server that is used by companies for proxying, registration, and routing of SIP messages. This tutorial will guide you through the process of installing Kamailio on nixOS.

Prerequisites

Before we start, we need to make sure that the following prerequisites are met:

  • A computer running nixOS latest.

Installation Steps

Follow the steps below to install Kamailio on nixOS latest:

Step 1: Update the Packages

Before beginning the installation process, make sure that all the existing packages are up to date using the following command: 

sudo nix-channel --update

Step 2: Install Kamailio

Run the following command to install Kamailio on your system: 

sudo nix-env -iA nixos.kamailio-full

This command will install the full version of Kamailio along with all its dependencies.

Step 3: Configure Kamailio

Next, we need to configure Kamailio. Navigate to the /etc/kamailio directory and create a new file named kamailio.cfg using the following command: 

sudo nano /etc/kamailio/kamailio.cfg

Add the following content to the kamailio.cfg file: 

#!define WITH_MYSQL
#!define WITH_AUTH
#SET THE ADDRESS AND PORT TO BIND TO
listen=UDP_ADDR:PORT
listen=TCP_ADDR:PORT
listen=TLS_ADDR:PORT
#SET THE DATABASE CONNECTION INFORMATION
db_url="mysql://USER:PASSWORD@localhost/DATABASENAME"
#LOAD THE AUTHORIZATION MODULE
loadmodule "auth.so"
#LOAD THE DATABASE MODULE
loadmodule "db_mysql.so"

Replace the following values in the above file:

  • UDP_ADDR:PORT with the address and port you want Kamailio to listen to for UDP connections.
  • TCP_ADDR:PORT with the address and port you want Kamailio to listen to for TCP connections.
  • TLS_ADDR:PORT with the address and port you want Kamailio to listen to for TLS connections.
  • USER with the username of your database.
  • PASSWORD with the password of your database.
  • DATABASENAME with the name of your database.

Save and close the file when done.

Step 4: Start Kamailio

Run the following command to start Kamailio: 

sudo systemctl start kamailio

Once Kamailio is started, you can verify that it's running by checking its status using the following command: 

sudo systemctl status kamailio

If Kamailio is running, the output should show that the service is active and running.

Step 5: Configure the Firewall

Finally, we need to configure the firewall to allow incoming traffic to Kamailio. Run the following command to open the necessary ports: 

sudo firewall-cmd --zone=public --add-port=5060/udp --add-port=5060/tcp --add-port=5061/tcp --permanent

This command will allow incoming traffic to port 5060 for UDP and TCP connections as well as port 5061 for TLS connections.

Conclusion

You have successfully installed Kamailio on nixOS latest. You can now use it for proxying, registration, and routing of SIP messages.