tcpdump
Tcpdump is a powerful command-line packet analyzer that allows users to display the contents of network packets transmitted or received over a network to which the computer is attached. It operates on most Unix-like systems, including Linux, Solaris, FreeBSD, NetBSD, OpenBSD, and macOS, utilizing the libpcap library for network traffic capture. Tcpdump can read packets from a network interface card or from a previously created saved packet file, and it provides options to write packets to standard output or a file. Users can apply BPF-based filters to limit the number of packets processed, enhancing usability on networks with high traffic volumes. The tool is distributed under the BSD license, making it free software. In many operating systems tcpdump is available as a native package or port, which simplifies installation of updates and long-term maintenance.
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Paessler PRTG
Paessler PRTG is an all-inclusive monitoring software solution developed by Paessler. Equipped with an easy-to-use, intuitive interface with a cutting-edge monitoring engine, PRTG optimizes connections and workloads as well as reduces operational costs by avoiding outages while saving time and controlling service level agreements (SLAs). The solution is packed with specialized monitoring features that include flexible alerting, cluster failover solution, distributed monitoring, in-depth reporting, maps and dashboards, and more.
PRTG monitors your entire IT infrastructure. All important technologies are supported:
• SNMP: ready-to-use and custom options
• WMI and Windows Performance Counters
• SSH: for Linux/Unix and macOS systems
• Traffic analysis using flow protocols or packet sniffing
• HTTP requests
• REST APIs returning XML or JSON
• Ping, SQL, and many more
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CommView
CommView is a powerful network monitor and analyzer designed for LAN administrators, security professionals, network programmers, home users…virtually anyone who wants a full picture of the traffic flowing through a PC or LAN segment. Loaded with many user-friendly features, CommView combines performance and flexibility with an ease of use unmatched in the industry. This application captures every packet on the wire to display important information such as a list of packets and network connections, vital statistics, protocol distribution charts, and so on. You can examine, save, filter, import and export captured packets, view protocol decodes down to the lowest layer with full analysis of over 100 supported protocols. With this information, CommView can help you pinpoint network problems and troubleshoot software and hardware. The newest CommView version 7.0 introduced SSL/TLS traffic decryption on the fly.
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Omnipeek
Omnipeek is a network protocol analyzer from LiveAction designed to deliver deep packet analysis and rapid troubleshooting on Windows systems. It captures and analyzes packet data in real time to help identify network, application, and security issues. Omnipeek provides intuitive visualizations that make complex network data easy to understand and act on. The platform records exactly what happened on the network, enabling detailed forensic analysis after incidents occur. Built-in expert analysis automatically detects hundreds of common network problems and triggers alerts when policies are violated. Omnipeek supports voice, video, wireless, and high-speed networks, including multi-gigabit environments. It is designed to significantly reduce mean time to resolution for even the most complex network issues.
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