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Continuous Development Since 2001
SER-Kamailio - the project that shaped the evolution of open source real time communications
Powering Open Real Time Communications
SIP Load Balancer, IP Telephony Engine, Least Cost Routing, SIP Firewall, Edge Proxy, SBC, Registrar and Location Service, Instant Messaging and Presence, MSRP, WebRTC, IPv4-IPV6, IMS, VoLTE
16Sep/15

Kazoocon, Oct 5-6, 2015, in San Francisco

September 16, 2015Events, Newsmiconda

Kazoo project organizes its annual conference in San Francisco, USA, during October 5-6, 2015. Kazoo platform embeds Kamailio as its core SIP routing engine, a module with same name, kazoo, being partRead More…

15Sep/15

Elastix World 2015

September 15, 2015Events, Newsmiconda

Elastix World 2015 takes place in Bogota, Colombia, during October 7-8, 2015. Kamailio is part of Elastix Multi Tenant (Elastix MT) distribution, therefore expect to meet many community members there. Long timeRead More…

10Sep/15

Kamailio v4.3.2 Released

September 10, 2015News, Releasesmiconda

Kamailio SIP Server v4.3.2 stable is out – a minor release including fixes in code and documentation since v4.3.1 – configuration file and database compatibility is preserved. Kamailio (former OpenSER) v4.3.2 is basedRead More…

08Sep/15

IRC Devel Meeting, Sep 16, 2015

September 8, 2015Newsmiconda

We are considering to organize the next IRC devel meeting to sync on the plans for Kamailio short term evolution. A wiki page has been created to keep track of what shouldRead More…

07Sep/15

Async SIP Routing with Kamailio and Node.js

September 7, 2015New Modules, News, Tips & Tricks4.3, javascript, node.js, rtjsonmiconda

One of the interesting modules added in Kamailio v4.3 is rtjson – in short, it defines a JSON document format that can be used to specify and push destination addresses when routingRead More…

03Sep/15

SIP Security – Analyze SIP HA1 Values

September 3, 2015Companion Software, News, Related Productsauthentication, md5, securitymiconda

WWW-Digest authentication (RFC 2617), the same used to authenticate users in SIP, requires that both server and user share and store the same secret. Storing the password in clear text is reallyRead More…

03Sep/15

Kamailio – The 15th Year Ahead

September 3, 2015Events, Newsanniversarymiconda

Another development year for Kamailio is gone, which means that the project enters its 15th full season of writing code. Back in 2001, on the 3rd of September, the first commit wasRead More…

24Aug/15

Kamailio and Docker

August 24, 2015News, Related Productsmiconda

Containers have become rather popular lately and Docker is the technology leader. Containers make it easy to prototype and test, but many see them as a way to scale on demand, therefore pushing towardsRead More…

18Aug/15

Cluecon Follow Up

August 18, 2015Events, Newsmiconda

Another edition of Cluecon conference ended recently in Chicago, a good crowd of VoIP developers spent time together to share what is new around the world for real time communications. Daniel-Constantin MierlaRead More…

30Jul/15

Kamailio v4.2.6 Released

July 30, 2015News, Releases4.2, releasesmiconda

Kamailio SIP Server v4.2.6 stable is out! This is a minor release including fixes in code and documentation since v4.2.5. Kamailio (former OpenSER) v4.2.6 is based on the latest version of GIT branch 4.2, thereforeRead More…

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News

  • Kamailio v6.0.2 Released June 25, 2025
  • Kamailio v5.7.7 Released May 21, 2025
  • Donating To Kamailio Project April 7, 2025
  • Kamailio v5.8.6 Released March 20, 2025
  • Kamailio World 2025 – A Preview Of Sessions March 19, 2025
  • Kamailio v6.0.1 Released March 10, 2025
  • Kamailio World 2025 – First Group Of Speakers Announced February 24, 2025
DONATE TO KAMAILIO

– Download latest release –

6.0.2

(June 25, 2025)

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Short History

The initial name of the project was SIP Express Router (aka SER), started in 2001 by Fraunhofer Fokus Research Institute and released under GPLv2 in 2002. In 2005, OpenSER project spawned from SER and had to change the name to Kamailio in summer of 2008 due to trademark claims. During the autumn of 2008, Kamailio and SER teams decided to join back the projects and use further the Kamailio name.

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