Open Source Network Analyzers

Foremost network protocol analyzer with multi-platform support, deep protocol inspection, VoIP analysis, and extensive file format compatibility.

Free, open-source utility for network security auditing and exploration with capabilities for OS detection, service identification, and large network scans.

Fast Android port scanner providing network information and quick host discovery. Designed for systems and network security with real-time insights.

tcpdump is a common packet analyzer that runs under the command line. It allows the user to intercept and display TCP/IP and other packets being transmitted or received over a network to which the computer is attached.

Vistumbler is a wireless network scanner and mapping utility designed for Windows Vista and above

NetworkMiner is a Network Forensic Analysis Tool (NFAT) for Windows. NetworkMiner can extract transmitted files and certificates from PCAP files containing HTTP, FTP, SMB, SMB2, TFTP and several other protocols.

NETworkManager is a powerful tool for managing networks and troubleshoot network problems! It includes a variety of tools such as an IP scanner, Port Scanner, Ping Monitor, WiFi analyzer, PuTTY/RemoteDesktop with tabs or an LLDP/CDP capture (and many more) in a unified user...

Ping Tracer continuously pings each network host between your computer and a given destination, helping visually identify the source of connectivity problems.

NeoStumbler is an application for collecting locations of Wi-Fi networks, cell towers and Bluetooth beacons to Mozilla Location Services.

The iperf series of tools perform active measurements to determine the maximum achievable bandwidth on IP networks. It supports tuning of various parameters related to timing, protocols, and buffers. For each test it reports the measured throughput, loss, and other parameters.

NetVisor scans your network, identifies hosts and services, and generates an interactive visualization showing how everything connects, letting you easily create and maintain network documentation.

Vernet - Network Analyzer and Monitoring Tool.

Test the blocking of websites and apps. Measure the speed and performance of your network.

Network recon framework, including a web interface to browse Nmap scan results.

vmPing (Visual Multi Ping) is a graphical ping utility for monitoring multiple hosts. Numerous host monitors can be added and removed, and each monitor dynamically resizes with the application window. Color-coding allows you to tell at a glance the status of each host.

Ettercap is a suite for man in the middle attacks on LAN. It features sniffing of live connections, content filtering on the fly and many other interesting tricks.

Open source cross-platform (Windows/Linux/Mac) Java Visual Traceroute, packet sniffer and Whois. Data is displayed in a 3D or a 2D map component.

PCAPdroid is an android app to capture the phone traffic and analyze it remotely (e.g. via Wireshark). The traffic can be easily downloaded from a remote device thanks to the integrated HTTP server, or streamed to a remote UDP receiver.

An arpspoofing program that lets users launch spoofed arp requests to disrupt connections in a LAN.

Lightweight network IP scanner written in Go. With notifications, history and export to Grafana.

Eye candy ARP spoofer for Windows. elmoCut aims to make arp spoofing easy for all users with all the hard work done under the hood.

Flows-first PCAP TUI (case files, gorgeous UX). Do do do do.

LinSSID is graphically and functionally similar to iwscanner (Linux) and Inssider (Microsoft™ Windows®). It is written entirely in C++ using Linux wireless tools and Qt4.

Pingnoo is an open-source Windows, macOS and Linux visual trace route analyser.

Moloch augments your current security infrastructure to store and index network traffic in standard PCAP format, providing fast, indexed access. An intuitive and simple web interface is provided for PCAP browsing, searching, and exporting.