Zeek

Zeek
Original authorVern Paxson
Initial release24 January 1998 (1998-01-24)
Stable release
8.0.4 / 5 November 2025 (5 November 2025)
Written inC++
Operating systemLinux, FreeBSD, macOS
TypeNetwork intrusion detection system
LicenseBSD license
Websitezeek.org
Repository

Zeek is a free and open-source software network analysis framework. Vern Paxson began development work on Zeek in 1995 at Lawrence Berkeley National Lab. Zeek is a network security monitor (NSM) but can also be used as a network intrusion detection system (NIDS). The Zeek project releases the software under the BSD license.