Nmap vs Zeek
GitHub Stats
About Nmap
Nmap (Network Mapper) is a free and open-source utility for network discovery and security auditing. It uses raw IP packets to determine available hosts, services, operating systems, packet filters/firewalls, and dozens of other characteristics. It was designed to rapidly scan large networks but works fine against single hosts. Nmap's scripting engine (NSE) allows users to write and share scripts to automate networking tasks, from vulnerability detection to backdoor discovery. It's used by security professionals, system administrators, and researchers worldwide.
About Zeek
Zeek (formerly Bro) is a powerful network analysis framework that sits on a network tap, link, or live interface and generates detailed logs describing network activity. Unlike traditional IDS systems that match signatures, Zeek performs deep protocol analysis to produce structured logs for every connection, DNS query, HTTP request, SSL certificate, file transfer, and dozens of other protocol events. These logs are the foundation for network security monitoring - they tell you not just that something happened, but exactly what happened at the application layer. Zeek's scripting language allows custom analysis, from detecting specific attack patterns to extracting files from network traffic. It's widely deployed in academic networks, enterprises, and government agencies, and its logs are commonly fed into SIEM platforms for correlation and alerting. Zeek also includes a signature framework for traditional pattern matching and a file analysis framework for extracting and inspecting transferred files.
Platform Support
Tags
Nmap only
Zeek only