The Zeek project officially supports a range of platforms and current releases. As a rule of thumb, we aim to support at least the two most recent stable releases actively supported on a given platform, and we strive to support freely available long-term support (LTS) versions. Specifically:

^{1: CentOS 8 EOL'd earlier than expected, at the end of 2021, due to the shift to CentOS Stream. We've adopted that shift.
2: Fedora releases every 6 months and maintains for 13, so it has 2-3 currently maintained releases; 3 during the 1-month overlap window, 2 otherwise.
3: According Cirrus CI, images older than Catalina aren't available, but they have started persisting images going forward.}

For details on individual operating system versions, please consult our OS support matrix.

To build Zeek on one of the above platforms, please consult our CI setups for platform-specific requirements. For Linux distros our Dockerfiles show required packages and configuration steps, and for VM images (FreeBSD & macOS) the prepare.sh scripts contain the same.

Platform support goes both ways: if you're using a supported platform, Zeek will build and function as expected. Conversely, we refrain from using features (such as recent C++ or Python language features) that are not provided on all of the currently supported platforms. Put simply: if it works with all platforms in our CI, we may end up using it, and won't use it otherwise.

To track current versions, we maintain a release calendar in Google Calendar and iCal formats.

External resources that might help automate this in the future:

• https://github.com/endoflife-date/endoflife.date