Justniffer

Justniffer: Open Source Network Protocol Analyzer & Packet Sniffer

Justniffer is an open source network protocol analyzer and packet sniffer. It can intercept and log traffic passing over a digital network and analyze the traffic for debugging, data analysis, and more.

What is Justniffer?

Justniffer is an open source network protocol analyzer and packet sniffer software. It can intercept and log traffic passing over a wired or wireless digital network, and allows users to analyze the traffic for a variety of purposes including debugging network issues, analyzing network usage and performance, reverse engineering network protocols, and more.

As a packet sniffer, Justniffer can capture all packets traveling over a network segment in real-time and save them to disk in a PCAP format compatible with other tools like Wireshark. Users can apply filters to only capture specific packets they are interested in analyzing. Justniffer provides a graphical user interface showing captured packets in detail, with summary info as well as the full packet contents including headers and payloads.

Key features of Justniffer include:

• Real-time packet capture and offline analysis capabilities
• Support for common network protocols including TCP, UDP, ICMP, HTTP, DNS, and more
• A customizable GUI with details on each packet's source, destination, protocol, length, and more
• Filters for selective packet capturing based on protocols, subnets, ports, and other criteria
• Exporting of captured packet data to PCAP files
• A portable Windows executable that runs without needing to be installed

Justniffer can help network administrators monitor traffic for suspicious behavior, troubleshoot connectivity and performance issues, verify firewall rules, and more. Software developers can also use Justniffer to debug and reverse engineer custom network protocols. The software is free and open source, providing an accessible alternative to commercial solutions for packet analysis.

Justniffer Features

Official Links