Free expert packets sniffer protocol analyzer software for windows

MSNProtocol Analyzer (MSNPAnalyzer) is a network tool that can monitor (or capture, monitor) the sessions of MSN Protocol.
If you use this program in conbination with SwitchSniffer program, you can capture and see all the MSNP sessions including conversations and MSN commands.
Main features:
- MSNPAnalyzer can monitor 2 NICs or more at once.
- MSNPAnalyzer can show MSN commands and the procedures of connection.
- MSNPAnalyzer enables you to see all the conversions on the network.
- If MSNPAnalyzer is used in conbination with SwitchSniffer program, You can capture all see all the MSN protocols and conversations.
- It is very easy to make MSNPAnalyzer to work. Just run MSNPAnalyzer on any computer on your network, and start to monitor.
- MSNPAnalyzer parses, decodes, analyzing MSN protocol in real-time.
- MSNPAnalyzer enables you to viewing the contents, commands and sessions of MSN protocol on-the-fly

Ethereal - Network Protocol Analyzer 0.99 is a professional tool that is used by network professionals around the world for troubleshooting, analysis, software and protocol development, and education. It has all of the standard features you would expect in a protocol analyzer.

Network Sniffer is a Windows based Packet sniffer an Network analyzer
Network Sniffer is a Windows based Packet sniffer an Network analyzer, a revolutionary new network management tool designed from the ground up with ease and functionality in mind.
Network Sniffer aids at monitoring network traffic in order to recognize and decode certain packets of interest. Network Sniffer puts your Network adapter into listening mode, capturing everything that travels through the Network.
This can help you solve network bottlenecks or spot illegitimate activity like crack attacks, Spyware, and other sort of malicious, unormal Traffic.
Key Features:
1. Simple network sniffer/packet capturing tool
2. Intuitive user interface.
3. Can detect OSs, sessions, hostnames, open ports etc.
4. Does overload traffic on the network. 5. Can also parse PCAP files for off-line analysis.

Process And Port Analyzer 2 is known as a smart and useful process that will port mapper, active TCP and UDP connection viewer, find out which processes are using which ports. View the traffic of your server/pc in real time with a powerfull Packet sniffer and packet data viewer.

Enhancements:

• Version 2 includes lighter packet sniffer and packet data viewer.

ProtocolReader 1 is considered as a flexible and effective protocol analyse tool for parsing and displaying received binary messages.

With an easy-to-use interface and programable kernel, it can support variety of protocols such as IP based protocols(TCP,UDP, RTP, etc), Telcomunication rotocols (MTP3,ISUP,TUP, etc), or you can define new custom decoders of non-standard or rare protocols.

Unlike other protocol analyzer tool, they provide advanced features to meet future needs, not only for standard protocols, but also for user-defined protocols . Instead of waiting long time for a new protocol decoder to be released, you can easily write a script to support new protocols in a incredible short time by yourself.

Requirements: Windows 98/Me/NT/2000/XP/2003 Server/Vista