Justniffer is a network protocol analyzer that captures network traffic and produces logs in a customized way, can emulate Apache web server log files, track response times and extract all “intercepted” files from the HTTP traffic. The main feature of justniffer is to analyze network traffic to monitor performances.
It lets you interactively trace tcp traffic from a live network or from a previously saved capture file. Justniffer’s native capture file format is libpcap format, which is also the format used by tcpdump and various other tools.
This is free and open source software.
Features include:
- Reliable TCP flow rebuilding: it can reorder, reassemble tcp segments and ip fragments using portions of the Linux kernel code.
- Logging text mode can be customized.
- Extensibility by any executable, such as bash, python, perl scripts, ELF executable, etc.
- Performance measurement it can collect many information on performances: connection time, close time, request time , response time, close time, etc.
- Ability to handle all those complex low level protocol issues and retrieve the correct flow of the TCP/IP traffic: IP fragmentation, TCP retransmission, reordering. etc.
- It uses portions of Linux kernel source code for handling all TCP/IP stuff.
- Optimized for “Request / Response” protocols. It is able to track server response time. Quickly identify the most significant bottlenecks analyzing the performance at “application” protocol level.
- Useful to understand how communication takes place between different components, and when this is implemented as a network protocol based on TCP/IP (HTTP, JDBC, RTSP, SIP, SMTP, IMAP, POP, LDAP, REST, XML-RPC, IIOP, SOAP, etc.).
- Capture traffic in promiscuous mode so it can be installed on dedicated and independent station within the same network “collision domain” of the gateway of the systems that must be analyzed, collecting all traffic without affecting the system performances and requiring invasive installation of new software in production environments.
- Rebuild and save HTTP content on files – multipurpose sniffer.
- Extensible – can be extended by external scripts. A python script has been developed to recover all files sent via HTTP (images, text, html, javascript, etc.).
Website: onotelli.github.io/justniffer
Support: GitHub Code Repository
Developer: Oreste Notelli
License: GNU General Public License v3.0
Justniffer is written in C and C++. Learn C with our recommended free books and free tutorials. Learn C++ with our recommended free books and free tutorials.
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