yaf ☆
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Description:
Yet another flowmeter: processes packet data from pcap(3)
Type: Formula  |  Latest Version: 2.18.2@0  |  Tracked Since: Dec 11, 2025
Links: Homepage  |  formulae.brew.sh
Category: Networking
Tags: networking security packet-capture flow-analysis monitoring
Install: brew install yaf
About:
Yaf is a command-line tool that captures and processes network traffic data from pcap files or live interfaces. It generates detailed flow records containing metadata like IP addresses, ports, and protocol information. This utility is essential for network security monitoring and traffic analysis, exporting data in formats compatible with flow analysis systems.
Key Features:
  • Deep packet inspection for application-level metadata
  • Support for both live capture and offline pcap file processing
  • Generates IPFIX (Internet Protocol Flow Information Export) formatted flow records
  • Handles fragmented packets and TCP stream reassembly
Use Cases:
  • Network traffic monitoring and analysis for security auditing
  • Extracting flow data for incident response and forensics
  • Bandwidth usage monitoring and application identification
Alternatives:
  • tcpdump – tcpdump captures raw packets while yaf focuses on generating aggregated flow records
  • nfdump – nfdump is primarily for analyzing flow data, whereas yaf specializes in creating flow records from packet data
Version History
Detected Version Rev Change Commit
Dec 11, 2025 9:17pm 0 VERSION_BUMP bd3b308f
Nov 21, 2025 8:26pm 0 VERSION_BUMP 8071c280
Nov 24, 2024 3:00pm 0 VERSION_BUMP 337c699f
Nov 13, 2024 10:49am 0 VERSION_BUMP 5bb20b92
Sep 26, 2024 10:51pm 0 VERSION_BUMP ce105d3f
Sep 26, 2024 9:53pm 0 VERSION_BUMP e537d536
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