Sniffnet is a free, Rust‑written network monitoring application that offers real‑time traffic visualization, precise IP and geographic identification, protocol analysis, customizable themes, and exportable PCAP capture files, with step‑by‑step installation guides for Windows, macOS, and Linux, plus optional Npcap support.
This article introduces the open‑source traffic‑replay tool TCPCopy, explains its 1.0 architecture—including the tcpcopy and intercept components—covers its packet‑capture and injection methods (raw socket vs pcap), TCP state handling, routing challenges, intercept role, and performance characteristics, providing practical insights for backend testing and operations.
This article explains how to capture network traffic with tcpdump, parse the resulting PCAP file using Node.js (node‑pcap), extract HTTP request/response data and timing information, and convert it into HAR format for detailed H5 performance analysis.
