Free softperfect network protocol analyzer 2.6 software for windows

Network Monitor is a protocol analyzer. It allows you to capture network traffic, view and analyze it. This version is a complete overhaul of the previous Network Monitor 2.x version.
Instructions
Network Monitor can co-exist with older versions of Network Monitor. NM3 installs in %program files%Microsoft Network Monitor 3.0, so there is no conflict.
For Microsoft Vista, Microsoft has a new driver that supports new features available in the NDIS 6.0 driver. If you are using tools that rely on Network Monitor 2.x NPPTools, these tools will no longer work.
Capturing on Vista requires NM3, as Netmon2.x does not capture properly on Vista. If during installation, you opt to use Microsoft Update to receive critical updates, then the installer will configure your system to receive these updates. If this configuration fails (because, for example, your Automatic Update settings are managed by a network administrator), the installation will continue without informing you. To ensure you have successfully signed up for Microsoft update, go here. If the configuration was successful, the site will provide information about available updates. If not, the site allows you to sign up for Microsoft Update directly.
Warning: Capturing with the NM3 GUI with conversations enabled can use up considerable amount of memory. This may cause a machine to become unresponsive. If you need to capture data for long periods of time, please use the included command line utility, NMCap, and the /DisableConversations switch.
System requirements:
- It is suggested that you have a CPU of 1GHz or greater, 1G or greater of Memory and 25 Megs of available Hard Disk space, plus room for capture files.

Ax3soft Sax2 is a professional intrusion detection and prevention system that performs real-time packet capturing, 24/7 network monitoring, advanced protocol analyzing and automatic expert detection. By giving you insights into all of your network's operations, Sax2 makes it easy to isolate and solve network problems, identify network bottleneck and bandwidth use, detect network vulnerabilities and discovered the network whether there is a breach of security strategy and the signs of being attacked in the network of hazard, and then intercept and stop before their invasion.

Network administrators can directly monitor http requests, email messages, ftp transfers, as well as real-time activities and message details for the two popular instant messengers: MSN and QQ. Sax2 is designed to be used by both IT professionals and novice users. Problems are clearly identified, and solutions are suggested in understandable terms. Whether you're a network administrator who needs to identify, diagnose, and solve network problems quickly, an IT professional who wants to monitor user activities on the network, a security manager who needs to ensure that the corporation's communications assets are safe, or a consultant who has to quickly solve network problems for clients, Sax2 has the tools that you need.

Main Functions 1.Intrusion Detection and Prevention 2.Conduct of Audits 3.Traffic Statistics 4.Customize Security Policy 5.Real-Time Alert and Response