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Network sniffer initiating man-in-the-middle attacks on SSL connections in the LAN to test their vulnerability. Also useful for safety assessment of programs.

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Free HTTP and HTTPS sniffer for Internet Explorer and WinINET applications (SSL Sniffer). Displays all the traffic, including any encrypted SSL traffic, without using a proxy.

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This tool functions in a similar way to Net Stumbler. It’s written in AutoIt and is used to detect WLAN Access Points. Uses the ‘netsh wlan show networks mode=bssid’ Vista command to display WLAN information and imports or exports the access points’ GPS data from or to a KML file. Also available as Version 9.1 Beta 3 at Sourceforge. Contains adware. Fast and secure download from The H

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Displays information about the WLANs available in your environment, such as their SSID, MAC address, channel, encryption and signal strength. Offers GPS support. Android version available on Google Play.

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Network monitor and log analyser. Records data traffic and displays it with log information. For more details go to Network Monitor in the Microsoft TechNet Blog.

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Provides invisible logging of all activity on a computer or in a file to detect unauthorised or unwanted access by other users.

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Analyses and monitors TCP/IP packets transferred to the PC and records the data traffic. This log can be output in ASCII mode or hex format. The WinPCap Capture driver must be installed if you’re running Windows 98/NT/ME.

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Allows parents to monitor and analyse the network traffic and internet usage of their children in a LAN. Creates statistics and reports and can be used without configuration.

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This tool logs IP accesses and records evaluations directly in Excel, Access, or any other database (via OBDC) or other application (via OLE).

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This development of the discontinued Ethereal project logs and analyses data traffic on the network. Includes the required WinPCap. Portable version also available. Fast and secure download from The H

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Packet analysis for Ethernet and WLAN networks. Works at TCP/IP and application levels.

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Vulnerability scanner which (similar to Nessus) is based on modular plug-ins for dedicated vulnerabilities. So far 340 plug-ins for various tests are available.

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Tools for finding WLAN access points that respond to a Probe Request. Displays SSID, channel number and so on.

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Reads and analyses packages on encrypted WiFi networks and tries to crack the WEP key of packages with weak initialisation vectors. The program has had no development since 2004. Fast and secure download from The H

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Detects WLAN and Bluetooth connections for OS X.

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The Ethereal network sniffer in its new Windows outfit. Download requires a valid email address.

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Wireless LAN monitor for Linux which analyses wireless networks.

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Graphical front end for the tcpdump network package sniffer that’s integrated in Mac OS X. Enables you to display all the traffic on the network connections. Manufacturer’s web site currently not available

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Security scanner suite for client and server. Find out more about version 4.2 at The H.

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Windows version of network analyser tcpdump. Requires WinPcap for logging of network packages.

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