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In this post, we shall perform a complete step-by-step installation of Kamailio SIP Server on Rocky Linux 8 | AlmaLinux 8. If you’re new to the world of VoIP and PBX systems, Kamailio is a successor a project previous known as (OpenSER and SER). It is a free to use and Open Source SIP Server released under the GPLv2+ license. Kamailio is capable of handling thousands of call setups per second. Kamailio can be setup as single server or to work in clustered and distributed manner.
Key features of Kamailio SIP Server
Kamailio’s main advantages for use alongside Media server like Asterisk are:
- Robust and Performant SIP (RFC3261) Server – Proxy, SIP Application server, Registrar server, Location server, and Redirect server.
- It is a flexible sip server a small footprint and modular architecture
- Kamailio provides robust SIP Routing Capabilities
- In Transport, it has support for UDP, TCP, TLS and SCTP protocols
- Asynchronous Processing
- Uses secure Communication through authentication, authorization, and encryption mechanisms
- Support for Accounting, and IP and DNS features
- Kamailio can be used in geographic distributed VoIP platforms
- Kamailio least-cost-routing scales up to millions of routing rules
- Straightforward interconnection with PSTN gateways
- Support for Multiple Database Backends – (MySQL, PostgreSQL, SQLite, UnixODBC, BerkeleyDB, Oracle, text files) and other database types which have unixodbc drivers
- Extensibility APIs – Support Perl, Java, Lua, JavaScript, Python interfacing among many other languages
Install Kamailio SIP Server on Rocky Linux 8 | AlmaLinux 8
With the introduction of Kamailio SIP Server, we can switch our focus to the actual installation. The requirements for this installation are as captured below:
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- Rocky Linux 8 | AlmaLinux 8 server
- Internet access is required on the server
- Terminal access to the server as root or as standard user with sudo powers
Step 1: Update system and set SELinux in Permissive
Update your system by running the following commands
sudo dnf updateAfter the upgrade is done, set SELinux in Permissive mode or optionally disable it.
sudo setenforce 0
sudo sed -i 's/^SELINUX=.*/SELINUX=permissive/g' /etc/selinux/config
Confirm the status of SELinux after the update:
$ sestatus
SELinux status: enabled
SELinuxfs mount: /sys/fs/selinux
SELinux root directory: /etc/selinux
Loaded policy name: targeted
Current mode: permissive
Mode from config file: enforcing
Policy MLS status: enabled
Policy deny_unknown status: allowed
Max kernel policy version: 31Step 2: Add Kamailio YUM Repository
All Kamailio packages for the latest releases are provided in an RPM repository. This repo has to be added to the system manually.
Add Kamailio YUM repository on your system using below commands:
sudo yum -y install dnf-plugins-core
sudo yum config-manager --add-repo https://rpm.kamailio.org/centos/kamailio.repoCheck the current list of repositories configured on your system to confirm:
$ sudo dnf -y repolist
repo id repo name
appstream Rocky Linux 8 - AppStream
baseos Rocky Linux 8 - BaseOS
extras Rocky Linux 8 - Extras
kamailio Kamailio - latest - Packages for the Kamailio latest releaseWe can see Kamailio repo in the output.
Step 3: Install Kamailio SIP Server on Rocky Linux 8 | AlmaLinux 8
We need a database server while running Kamailio SIP server for storing data. The version of MariaDB available on the system repositories is ok for this purpose.
sudo dnf -y install mariadb-serverStart and secure MariaDB server installation
sudo systemctl enable --now mariadb
sudo mysql_secure_installationEnsure connection to MariaDB shell is working
$ mysql -u root -p
Enter password:
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MariaDB connection id is 16
Server version: 10.3.28-MariaDB MariaDB Server
Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MariaDB [(none)]> exit
Install all Kamailio SIP Server packages and dependencies:
sudo yum install vim kamailio kamailio-mysql kamailio-presence kamailio-ldap kamailio-debuginfo kamailio-xmpp kamailio-unixodbc kamailio-utils kamailio-gzcompress kamailio-tls kamailio-outboundDependency tree should be shown nd you can hit th y key in your keyboard to begin installation.
...
Dependencies resolved.
======================================================================================================================================================================================================
Package Architecture Version Repository Size
======================================================================================================================================================================================================
Installing:
kamailio x86_64 5.5.2-0.el8.centos kamailio 6.2 M
kamailio-debuginfo x86_64 5.5.2-0.el8.centos kamailio 4.3 M
kamailio-gzcompress x86_64 5.5.2-0.el8.centos kamailio 24 k
kamailio-ldap x86_64 5.5.2-0.el8.centos kamailio 109 k
kamailio-mysql x86_64 5.5.2-0.el8.centos kamailio 82 k
kamailio-outbound x86_64 5.5.2-0.el8.centos kamailio 29 k
kamailio-presence x86_64 5.5.2-0.el8.centos kamailio 736 k
kamailio-tls x86_64 5.5.2-0.el8.centos kamailio 195 k
kamailio-unixodbc x86_64 5.5.2-0.el8.centos kamailio 45 k
kamailio-utils x86_64 5.5.2-0.el8.centos kamailio 43 k
kamailio-xmpp x86_64 5.5.2-0.el8.centos kamailio 60 k
Upgrading:
vim-common x86_64 2:8.0.1763-16.el8 appstream 6.3 M
vim-enhanced x86_64 2:8.0.1763-16.el8 appstream 1.4 M
Installing dependencies:
libtool-ltdl x86_64 2.4.6-25.el8 baseos 57 k
mysql-common x86_64 8.0.26-1.module+el8.4.0+652+6de068a7 appstream 133 k
mysql-libs x86_64 8.0.26-1.module+el8.4.0+652+6de068a7 appstream 1.4 M
unixODBC x86_64 2.3.7-1.el8 appstream 453 k
Installing weak dependencies:
kamailio-debugsource x86_64 5.5.2-0.el8.centos kamailio 3.9 M
Enabling module streams:
mysql 8.0
Transaction Summary
======================================================================================================================================================================================================
Install 16 Packages
Upgrade 2 Packages
Total download size: 25 M
Is this ok [y/N]: yThe version of Kamailio installed can be checked with the following command:
$ kamailio -version
version: kamailio 5.5.2 (x86_64/linux) 55e232
flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLOCKLIST, HAVE_RESOLV_RES, TLS_PTHREAD_MUTEX_SHARED
ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
id: 55e232
compiled on 14:13:04 Aug 25 2021 with gcc 8.4.1Step 5: Connect Kamailio to database server
We need to edit Kamailio main configuration file /etc/kamailio/kamctlrc and configure DBENGINE
sudo vim /etc/kamailio/kamctlrcSet DBENGINE to MySQL and DBHOST to localhost:
DBENGINE=MYSQL
DBHOST=localhostCreate all databases and tables required by Kamailio:
$ sudo kamdbctl create
MySQL password for root: <INPUT-DATABASE-ROOT-USER-PASSWORD>
INFO: test server charset
INFO: creating database kamailio ...
INFO: granting privileges to database kamailio ...
INFO: creating standard tables into kamailio ...
INFO: Core Kamailio tables successfully created.
Create the presence related tables? (y/n): y
INFO: creating presence tables into kamailio ...
INFO: Presence tables successfully created.
Create the tables for imc cpl siptrace domainpolicy carrierroute
drouting userblocklist htable purple uac pipelimit mtree sca mohqueue
rtpproxy rtpengine secfilter? (y/n): y
INFO: creating extra tables into kamailio ...
INFO: Extra tables successfully created.
Create the tables for uid_auth_db uid_avp_db uid_domain uid_gflags
uid_uri_db? (y/n): y
INFO: creating uid tables into kamailio ...
INFO: UID tables successfully created.Two database users are created:
- kamailio: With the password
kamailiorwIt has read/write access permissions to the Kamailio database. - kamailioro: The password for this user is
kamailioro. It has read-only access permissions to the Kamailio database.
Access can be tested like below:
$ mysql -u kamailio -p
Enter password: kamailiorw
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MariaDB connection id is 68
Server version: 10.3.28-MariaDB MariaDB Server
Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MariaDB [(none)]> exit
Bye
$ mysql -u kamailioro -p
Enter password: kamailioro
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MariaDB connection id is 69
Server version: 10.3.28-MariaDB MariaDB Server
Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MariaDB [(none)]> exit
Bye
Edit /etc/kamailio/kamailio.cfg to configure Kamailio:
sudo vi /etc/kamailio/kamailio.cfgAdd the following lines just below #!KAMAILIO.
#!define WITH_MYSQL
#!define WITH_AUTH
#!define WITH_USRLOCDB
#!define WITH_NAT
#!define WITH_PRESENCE
#!define WITH_ACCDB
Start Kamailio
sudo systemctl restart kamailioEnable the service to start on boot:
sudo systemctl enable kamailioThat’s the end. You should now have a running Kamailio SIP server on your Rocky Linux 8 | AlmaLinux 8 Linux.
$ systemctl status kamailio
● kamailio.service - Kamailio - the Open Source SIP Server
Loaded: loaded (/usr/lib/systemd/system/kamailio.service; enabled; vendor preset: disabled)
Active: active (running) since Thu 2021-12-09 15:56:10 UTC; 10s ago
Main PID: 10550 (kamailio)
Tasks: 33 (limit: 49496)
Memory: 23.5M
CGroup: /system.slice/kamailio.service
├─10550 /usr/sbin/kamailio --atexit=no -DD -P /run/kamailio/kamailio.pid -f /etc/kamailio/kamailio.cfg -m 64 -M 8
├─10551 /usr/sbin/kamailio --atexit=no -DD -P /run/kamailio/kamailio.pid -f /etc/kamailio/kamailio.cfg -m 64 -M 8
├─10552 /usr/sbin/kamailio --atexit=no -DD -P /run/kamailio/kamailio.pid -f /etc/kamailio/kamailio.cfg -m 64 -M 8
├─10553 /usr/sbin/kamailio --atexit=no -DD -P /run/kamailio/kamailio.pid -f /etc/kamailio/kamailio.cfg -m 64 -M 8
├─10554 /usr/sbin/kamailio --atexit=no -DD -P /run/kamailio/kamailio.pid -f /etc/kamailio/kamailio.cfg -m 64 -M 8
├─10555 /usr/sbin/kamailio --atexit=no -DD -P /run/kamailio/kamailio.pid -f /etc/kamailio/kamailio.cfg -m 64 -M 8
├─10556 /usr/sbin/kamailio --atexit=no -DD -P /run/kamailio/kamailio.pid -f /etc/kamailio/kamailio.cfg -m 64 -M 8
├─10557 /usr/sbin/kamailio --atexit=no -DD -P /run/kamailio/kamailio.pid -f /etc/kamailio/kamailio.cfg -m 64 -M 8
├─10558 /usr/sbin/kamailio --atexit=no -DD -P /run/kamailio/kamailio.pid -f /etc/kamailio/kamailio.cfg -m 64 -M 8
├─10559 /usr/sbin/kamailio --atexit=no -DD -P /run/kamailio/kamailio.pid -f /etc/kamailio/kamailio.cfg -m 64 -M 8
├─10560 /usr/sbin/kamailio --atexit=no -DD -P /run/kamailio/kamailio.pid -f /etc/kamailio/kamailio.cfg -m 64 -M 8
├─10561 /usr/sbin/kamailio --atexit=no -DD -P /run/kamailio/kamailio.pid -f /etc/kamailio/kamailio.cfg -m 64 -M 8
├─10562 /usr/sbin/kamailio --atexit=no -DD -P /run/kamailio/kamailio.pid -f /etc/kamailio/kamailio.cfg -m 64 -M 8
├─10563 /usr/sbin/kamailio --atexit=no -DD -P /run/kamailio/kamailio.pid -f /etc/kamailio/kamailio.cfg -m 64 -M 8
├─10564 /usr/sbin/kamailio --atexit=no -DD -P /run/kamailio/kamailio.pid -f /etc/kamailio/kamailio.cfg -m 64 -M 8
├─10565 /usr/sbin/kamailio --atexit=no -DD -P /run/kamailio/kamailio.pid -f /etc/kamailio/kamailio.cfg -m 64 -M 8
├─10566 /usr/sbin/kamailio --atexit=no -DD -P /run/kamailio/kamailio.pid -f /etc/kamailio/kamailio.cfg -m 64 -M 8
├─10567 /usr/sbin/kamailio --atexit=no -DD -P /run/kamailio/kamailio.pid -f /etc/kamailio/kamailio.cfg -m 64 -M 8
├─10568 /usr/sbin/kamailio --atexit=no -DD -P /run/kamailio/kamailio.pid -f /etc/kamailio/kamailio.cfg -m 64 -M 8
├─10569 /usr/sbin/kamailio --atexit=no -DD -P /run/kamailio/kamailio.pid -f /etc/kamailio/kamailio.cfg -m 64 -M 8
├─10570 /usr/sbin/kamailio --atexit=no -DD -P /run/kamailio/kamailio.pid -f /etc/kamailio/kamailio.cfg -m 64 -M 8
├─10571 /usr/sbin/kamailio --atexit=no -DD -P /run/kamailio/kamailio.pid -f /etc/kamailio/kamailio.cfg -m 64 -M 8
├─10572 /usr/sbin/kamailio --atexit=no -DD -P /run/kamailio/kamailio.pid -f /etc/kamailio/kamailio.cfg -m 64 -M 8
├─10573 /usr/sbin/kamailio --atexit=no -DD -P /run/kamailio/kamailio.pid -f /etc/kamailio/kamailio.cfg -m 64 -M 8
├─10574 /usr/sbin/kamailio --atexit=no -DD -P /run/kamailio/kamailio.pid -f /etc/kamailio/kamailio.cfg -m 64 -M 8
├─10575 /usr/sbin/kamailio --atexit=no -DD -P /run/kamailio/kamailio.pid -f /etc/kamailio/kamailio.cfg -m 64 -M 8
├─10576 /usr/sbin/kamailio --atexit=no -DD -P /run/kamailio/kamailio.pid -f /etc/kamailio/kamailio.cfg -m 64 -M 8
├─10577 /usr/sbin/kamailio --atexit=no -DD -P /run/kamailio/kamailio.pid -f /etc/kamailio/kamailio.cfg -m 64 -M 8
├─10578 /usr/sbin/kamailio --atexit=no -DD -P /run/kamailio/kamailio.pid -f /etc/kamailio/kamailio.cfg -m 64 -M 8
├─10579 /usr/sbin/kamailio --atexit=no -DD -P /run/kamailio/kamailio.pid -f /etc/kamailio/kamailio.cfg -m 64 -M 8
├─10580 /usr/sbin/kamailio --atexit=no -DD -P /run/kamailio/kamailio.pid -f /etc/kamailio/kamailio.cfg -m 64 -M 8
├─10581 /usr/sbin/kamailio --atexit=no -DD -P /run/kamailio/kamailio.pid -f /etc/kamailio/kamailio.cfg -m 64 -M 8
└─10582 /usr/sbin/kamailio --atexit=no -DD -P /run/kamailio/kamailio.pid -f /etc/kamailio/kamailio.cfg -m 64 -M 8
...More guides on SIP /PBX systems:
- How To Install FreePBX on CentOS 8 / RHEL 8
- Configuring IVR in Asterisk PBX Server
- Secure Asterisk and FreePBX from VoIP Fraud and Brute force attacks
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