zeek

Zeek is a powerful open-source command line network analysis tool. Formerly known as Bro, Zeek is widely used for network traffic analysis and monitoring. It captures network packets and extracts valuable information from them, such as protocol-level logs and metadata. Zeek focuses on network security monitoring and can detect and alert on various types of network-based attacks, malware infections, and suspicious activities. It supports a wide range of protocols, including TCP, UDP, ICMP, DNS, HTTP, and SSL, among others. Zeek can analyze both live network traffic and stored PCAP files for offline analysis. Its signature-based detection engine allows you to create custom rules and signatures to match specific threats or patterns of interest. Zeek provides a flexible scripting language that enables the creation of advanced, customized detection rules and data analysis pipelines. It produces detailed logs that contain rich network information, helping analysts understand network behavior and investigate security incidents. Furthermore, Zeek offers various integrations with other security tools, such as SIEM platforms, enabling seamless integration into larger security operations.