Controlling a running platform A deployed SIP platform still needs operating: taking a gateway out of rotation, ending a dialog, flushing a cache, reading a report — on a system that is carrying calls at the same time. OpenSIPS exposes this through its Management Interface: dozens of commands that inspect and steer the running process, … Continue reading The MI Commands tool in Control Panel 9.4.0
We are pleased to announce a major refresh of the official OpenSIPS package repository infrastructure. The repositories available at: apt.opensips.org yum.opensips.org download.opensips.org are now served by a completely new repository and package-building system. Although the public addresses remain unchanged, the infrastructure behind them has been replaced. Existing configurations that reference these standard OpenSIPS domains will … Continue reading OpenSIPS APT and YUM Repositories Are Moving to GitHub Actions
The OpenSIPS documentation was designed and structured more than 15 years ago. The documentation covers a vast area - the generic manual, core documentation, module's documentation, tutorials, migration docs, tips and more. So there is a lot of content, currently sitting on top of mixtures of: formats ( wiki, html, xml) storing ( files on … Continue reading The re-design of the OpenSIPS Documentation
Security has always been an important part of the OpenSIPS development process. As a project used in production SIP infrastructures, OpenSIPS needs to remain stable, reliable and secure across a wide range of deployments. Recently, we received a significant number of security-related reports against the OpenSIPS code base. This follows a broader trend in open … Continue reading Recent Security Fixes in OpenSIPS
A key aspect of operating production systems is to be able to understand what your OpenSIPS is doing, why behaving in certain ways or what is the performance of it. And of course, you want to do all those while your OpenSIPS is keep handling production traffic, so with no impact, no restart. These are … Continue reading Profiling your OpenSIPS 4.0
OpenSIPS 4.0 is not only about adding new features, but also about rethinking parts of the engine that have remained unchanged for a very long time. One of the most important examples is the TCP/TLS layer. The TCP framework, in the form we have known it so far, has stayed largely the same since it … Continue reading TCP/TLS rework in OpenSIPS 4.0
The OpenSIPS Summits have a 10 + years of history behind them. Started as an Amsterdam based event, the pandemic made us go and visit different cities each year - the community is the one voting, putting on the Summit map new locations like Houston, Athens and Valencia. This year is Bucharest! And there are … Continue reading OpenSIPS Summit 2026 Bucharest
Introduction One of the more stubborn SIP interop problems in modern networks is reliable provisional response handling, especially when bridging classic SIP deployments with IMS-oriented environments. In IMS-heavy networks, RFC 3262 support is often assumed. That means 100rel, RSeq, RAck and PRACK are not optional extras anymore, but part of normal call establishment. On the … Continue reading SIP PRACK/UPDATE Interworking Support in OpenSIPS 4.0
In real-life scenarios, the SIP routing is done across multiple IP interfaces (like public or private, different VPN's, IPv4 versus IPv6 or different protocols). Usually this is handled in OpenSIPS by picking / setting an outbound OpenSIPS socket for the handled call. But there are cases where such simple approach simply does not work: reaching … Continue reading Bond sockets in OpenSIPS 4.0
Modern SIP infrastructures increasingly rely on load balancers, reverse proxies and cloud edge services in order to provide scalability, security and geographic distribution. While these components are extremely useful, they often hide the original source address of the client from the backend SIP infrastructure. Starting with OpenSIPS 4.0, we are introducing support for the Proxy … Continue reading Proxy Protocol support in OpenSIPS 4.0
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