Network Monitor 3.3 is a protocol analyzer. It allows you to capture network traffic, view and analyze it. Version 3.3 is an update and replaces Network Monitor 3.2. Network Monitor 3.x is a complete overhaul of the previous Network Monitor 2.x version.

The Network Monitor core engine has been decoupled from the parser set. To install the full Network Monitor 3.3 product:

• Run the setup.exe for the platform you are installing.
• You will be prompted first to install the core engine. Follow the installation directions. Make sure you close existing instances of netmon.exe, nmcap.exe and any running NMAPI applications.
• Next you will be prompted to install the parser package. Follow the installation directions.

To uninstall the full Network Monitor 3.3 product:

• Go to Add/Remove Programs in Control Panel
• Uninstall both Microsoft Network Monitor 3.3 and Microsoft Network Monitor: Microsoft Parsers 3.3.

Download : Microsoft Downloads

Wireshark released a new version (1.0.4). The new version includes a number of security fixes. For details, see http://www.wireshark.org/news/20081020.html .

Just by its nature of including a large number of protocol parsers, Wireshark is a somewhat risky program. To mitigate the risk, collect traffic using a simpler program like tcpdump, and later analyze the traffic in wireshark using a low privilege account.