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TCPDump, a powerful command-line packet analyzer; and libpcap, a portable C/C++ library for network traffic capture. It prints out a description of the contents of packets on a network interface that match the boolean expression. The Packet Capture library provides a high level interface to packet capture systems. All packets on the network, even those destined for other hosts, are accessible through this mechanism.
Orion Sniffer (or simply, 'Orion') is capable of sniffing GIF, JPEG and PNG images from unencrypted network traffic and saving these images to disk on the fly. Its filter recognizes specific data (eg: A GIF image) received from a Source (eg: TCP/IP packet), and an Output Handler 'does something' with the data (eg: write it to a file).
jpcap is a set of Java classes which provide an interface and system for network packet capture. A protocol library and tool for visualizing network traffic is included. jpcap utilizes libpcap, a widely deployed system library for packet capture.
libpcap is a system-independent interface for user-level packet capture. libpcap provides a portable framework for low-level network monitoring. Applications include network statistics collection, security monitoring, network debugging, etc.
The callflow sequence diagram generator is a collection of awk and shell scripts that will take a packet capture file that can be read by wireshark and produce a time sequence diagram. This is useful to view amp; debug SIP callflows or other network traffic
SharpPcap is a cross-platform packet capture framework for the .NET environment, based on the famous pcap / WinPcap libraries. It provides an API for capturing, injecting, analyzing and building packets using any .NET language such as C# and VB.NET.
TPCAT is based upon pcapdiff by the EFF. TPCAT will analyze two packet captures (taken on each side of the firewall as an example) and report any packets that were seen on the source capture but didn’t make it to the dest. See docs for info.
ngrok is a reverse proxy that creates a secure tunnel between from a public endpoint to a locally running web service. ngrok captures and analyzes all traffic over the tunnel for later inspection and replay. You can give this URL to anyone to allow them to try out a web site you're developing without doing any deployment.
Program designed to be run as a software deployment from SCCM that will capture CDP packets on the clients, parse them and then inject that data into WMI where it can be retrieved by SCCM and reported to admins. If you find this useful feel free to donate, beer funds are always well received. ;)
Integrated packet generator and sniffer for Ethernet, but also works with blocks of data over TCP connection. Enables you to use scripts for automated testing, monitoring, imitating of various network objects, creating custom network tools.
justniffer is a TCP sniffer. It reassembles and reorders packets and displays the tcp flow in a customizable way. It can log network traffic in web server log format. It can also log network services performances (e.g. web server response times) and extract http content (images, html, scripts, etc)