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n2n is a layer-two peer-to-peer virtual private network

http://www.ntop.org/n2n/

n2n is a layer-two peer-to-peer virtual private network (VPN) which allows users to exploit features typical of P2P applications at network instead of application level. This means that users can gain native IP visibility (e.g. two PCs belonging to the same n2n network can ping each other) and be reachable with the same network IP address regardless of the network where they currently belong. In a nutshell, as OpenVPN moved SSL from application (e.g. used to implement the https protocol) to network protocol, n2n moves P2P from application to network level.

The main n2n design features are:

    * An n2n is an encrypted layer two private network based on a P2P protocol.
    * Encryption is performed on edge nodes using open protocols with user-defined encryption keys: you control your security without delegating it to companies as it happens with Skype or Hamachi.
    * Each n2n user can simultaneously belong to multiple networks (a.k.a. communities).
    * Ability to cross NAT and firewalls in the reverse traffic direction (i.e. from outside to inside) so that n2n nodes are reachable even if running on a private network. Firewalls no longer are an obstacle to direct communications at IP level.
    * n2n networks are not meant to be self-contained, but it is possible to route traffic across n2n and non-n2n networks.

DNS Benchmark – Domain Name Speed Benchmark

http://www.grc.com/dns/benchmark.htm

GRC's DNS Benchmark performs a detailed analysis and comparison of the operational performance and reliability of any set of up to 200 DNS nameservers (sometimes also called resolvers) at once. When the Benchmark is started in its default configuration, it identifies all DNS nameservers the user's system is currently configured to use and adds them to its built-in list of publicly available “alternative” nameservers. Each DNS nameserver in the benchmark list is carefully “characterized” to determine its suitability for use as a DNS resolver. This characterization includes testing each nameserver for its “redirection” behavior: whether it returns an error for a bad domain request, or redirects a user's web browser to a commercial marketing-oriented page. While such behavior may be acceptable to some users, others may find this objectionable.

When the benchmark is run, the current performance and apparent reliability of the DNS nameservers the system is currently using is compared among themselves, and also against the current performance and apparent reliability of the benchmark's list of all additional alternative nameservers.

Results are continuously displayed and updated while the benchmark is underway, with a dynamically sorted and scaled bar chart, and a tabular chart display showing the cached, uncached and “dotcom” DNS lookup performance of each nameserver. These values are determined by carefully querying each nameserver for the IP addresses of the top 50 most popular domain names on the Internet and also by querying for nonexistent domains.

Once the benchmark finishes, the results are heuristically and statistically analyzed to present a comprehensive yet simplified and understandable English-language summary of all important findings and conclusions. Based upon these results, users may choose to change the usage order of their system's own resolvers, or, if alternative public nameservers offer superior performance compared with the nameservers currently being used, to switch to one or more alternative nameservers.

XStentor Meter-montior Network Traffic

http://xstentor.neonixweb.com/

XStentor Meter is simple, and lightweight software, that will help you monitoring the data flow Download and Upload. You can select your Network Interface that will be monitored by XStentor Meter. You can configure the XStentor gui and graph as you want and absolutely we make it user friendly. This software is very simple and we will try to make this software more rich, more facilities and more important functions, so we need your support (donate), appreciation, suggestion, and opinion. Thanks.

NetShareMonitor

http://securityxploded.com/netsharemonitor.php

NetShareMonitor is the application to watch your shared files from the intruders and thereby protecting your shares from unauthorized access. As soon as remote user connects to your machine, NetShareMonitor detects it and displays information about that session. The session information includes remote host address, remote user name, list of accessed files and time of connection. Entire details pertaining to each session will be logged to file for future analysis.

Now you no longer have to worry about your shared files being accessed by unknown persons on the network. You can make NetShareMonitor to keep eye on your shares while you get down to work. It will alert you on any file access and you can always check the log files for past sessions in case you have missed the alert.

NetworkPasswordDecryptor

http://securityxploded.com/networkpassworddecryptor.php

NetworkPasswordDecryptor is the free tool to instantly recover the network passwords stored in the 'Credential Store' of Windows. Windows 'Credential Store' provides the framework for storing various network authentication based passwords in secure encrypted format. Not only Windows uses it to store network authentication passwords, but also other applications such as Outlook, Windows Live Messenger, Remote Destktop, Gmail Notifier etc uses it for storing their login passwords. These network passwords are saved only when the user has selected 'Remember Password' option during login time.
 
These network passwords are stored in encrypted format and even administrator cannot view these passwords. Also some type of passwords cannot be decrypted even by administrators as they require special privileges. In this context, NetworkPasswordDecryptor makes it easy to enumerate and decrypt all the stored network passwords from Credential Store. 

Free PC Inventory

http://www.networkmosaic.com/network-inventory-software.html

Free PC Inventory is a freeware information tool that grabs details of everything about your computer, from the hardware components through to the installed software versions. It even offers up a list of processes that are running. It's the kind of tool that could be invaluable if you're trying to hunt down a driver or errant component replacement. Definitely one for the toolbox.Free PC Inventory does not require installation and can be used as a portable application. It can be run from a removable storage device such as a CD-ROM drive, USB flash drive, flash card, or floppy disk. 

Network Activity Indicator for Windows 7

http://www.itsamples.com/network-activity-indicator.html

Network Activity Indicator displays the old 'two monitors' icon in Windows 7 that flashed blue to show network activity on the System Tray.Unlike the original Windows XP utility (that has individual indicators for each interface), this program indicates outgoing and incoming network packets on all available interfaces.

Cacti-network graphing solution

http://www.cacti.net/

Cacti is a complete network graphing solution designed to harness the power of RRDTool's data storage and graphing functionality. Cacti provides a fast poller, advanced graph templating, multiple data acquisition methods, and user management features out of the box. All of this is wrapped in an intuitive, easy to use interface that makes sense for LAN-sized installations up to complex networks with hundreds of devices.

iTraffic Monitor is a network monitor and reporting tool

http://www.trvx.com/itrafficmonitor/

iTraffic Monitor is a network monitor and reporting tool. It provides real time graph of network traffic. Detailed stats provide daily/weekly/monthly/yearly stats. Stop watch, Session stats.

• Monitor and review your Internet or network bandwidth usage with ease.
• How fast your internet connection? We can graph it for your review.
• How much data do you transfer? We show you a real-time graph or numerical display, as well as daily, weekly, monthly, or yearly reports.
• Requires minimal desktop space and system resources.

Network monitoring made easy with Connection Monitoring

http://www.globale-werbewelt.de/downloads/download-english/

As I haven’t been able to find a suitable program for monitoring my small home network without spending hundreds of Euros, I decided to develop my own – the Connection Monitor. This tool supports me in monitoring and securing my network. To enable you to do the same, I have made the Connection Monitor available as a free download.The Connection Monitor is a tool that allows the user to observe incoming and outgoing network connections. This is ideal for those whose computer is part of a local network or is accessible over an internet connection, as you can keep track of all wanted and unwanted outbound and inbound Socket-Connections on your computer monitor.

MobaSSH-Free SSH server for Windows

http://mobassh-en.mobatek.net/

MobaSSH allows you to run commands and transfer files on a remote Windows PC from any operating system (GNU/Linux, Unix, HP-UX, AIX, Windows, …) through a fully secured and encrypted network connection. MobaSSH is 100% compatible with the Linux/Unix/HPUx/AIX SSH clients, but also with Putty or WinSCP on Windows

Simple Port Tester

http://www.pcwintech.com/simple-port-tester

Simple Port Tester is a free program by PcWinTech.com to help users test if their ports are open with just a few clicks.
As of version 2.0.0 the program now tests both TCP & UDP ports.

 Screen shot

The trick with testing if your port forwarding is working is to have something on your computer actually listening on the port. If nothing is listening on the port the test will fail no matter what. This program will open the port, listen for the connection and help ensure a proper and reliable test as to whether or not your port forwarding is working.

Download, install and run it. Put in the port you wish to test and hit begin, that's it!

Copymark-test network file transfer performance

http://sourceforge.net/projects/copytest/

A simulation of real world file transfer performance. Generates files and then transfers them using the Windows Shell or Finder in OS X. Outputs performance results to .csv and has an optional plotting feature.

Vistumbler-find wireless access points

http://www.vistumbler.net/

Supports Windows Vista and Windows 7
Find Wireless access points – Uses the Vista command 'netsh wlan show networks mode=bssid' to get wireless information
GPS Support
Export/Import access points from Vistumbler TXT/VS1/VSZ or Netstumbler TXT/Text NS1
Export access point GPS locations to a google earth kml file or GPX(GPS eXchange format)
Live Google Earth Tracking – Auto KML automatically shows access points in google earth.
Speaks Signal Strength using sound files, windows sound api, or MIDI
Open Source ( AutoIt Scripting Language – http://www.autoitscript.com )
 

CloudBerry S3 Explorer – manage files on Amazon S3 Account 

http://www.cloudberrylab.com/?id=7

CloudBerry Explorer makes managing files in Amazon S3 storage EASY. By providing a user interface to Amazon S3 accounts, files, and buckets, CloudBerry lets you manage your files on cloud just as you would on your own local computer.

CodeTwo NetCalendars-share calendars without exchange

http://www.codetwo.com/freeware/netcalendars/

CodeTwo NetCalendars is a group calendar dedicated to those who would like to streamline the management of appointments in the company as well as improve the general workflow. The application enables multiple users to work jointly in shared calendars located on different computers in the local network or the Internet. The users can see and work on several calendars at one time displayed in one view. CodeTwo NetCalendars is compatible with Microsoft Outlook and will let share your personal Outlook calendar without Exchange Server

inSSIDer-free Wi-Fi network scanner

http://www.metageek.net/products/inssider

inSSIDer is an award-winning free Wi-Fi network scanner for Windows Vista and Windows XP. Because NetStumbler doesn't work well with Vista and 64-bit XP, we built an open-source Wi-Fi network scanner designed for the current generation of Windows operating systems. A year later, inSSIDer was discussed by Lifehacker and Tekzilla! 

Ekahau HeatMapper-free wi-fi coverage mapper

http://www.ekahau.com/products/heatmapper/overview.html

Ekahau HeatMapper is a free software tool for quick and easy coverage mapping of Wi-Fi (802.11) networks. It's the only free, easy-to-use tool that shows, on a map, the wireless network coverage in your home or small office. HeatMapper also locates all access points. HeatMapper also provides a real-time view to all access points and their configurations.

NetworkMiner-Network Forensic Analysis Tool

http://networkminer.sourceforge.net/

NetworkMiner is a Network Forensic Analysis Tool (NFAT) for Windows that can detect the OS, hostname and open ports of network hosts through packet sniffing or by parsing a PCAP file. NetworkMiner can also extract transmitted files from network traffic.

SYDI-open source document your network

http://sydiproject.com/

At the most basic level SYDI consists of a collection of scripts which collects information from your servers and networks, then writes the data to a report. Documenting a network can seem like a huge project, SYDI helps you get started. Instead of manually collecting information like ip addresses, os version, hardware configuration the scripts collects this automatically it can write directly to Word (or XML).

DHCP SERVERFREE-Full-Featured DHCP Software for Windows

http://www.antamediadhcp.com/

Assigning IP addresses without a DHCP server can create havoc, as can moving hardware across networks. Now all of your DHCP configuration and administrative tasks can be handled easily and automatically with our FREEWARE DHCP Server

Technitium MAC Address Changer

http://tmac.technitium.com/tmac/index.html

Technitium MAC Address Changer allows you to change Media Access Control (MAC) Address of your Network Interface Card (NIC) irrespective to your NIC manufacturer or its driver. It has a very simple user interface and provides ample information regarding each NIC in the machine. Every NIC has a MAC address hard coded in its circuit by the manufacturer. This hard coded MAC address is used by windows drivers to access Ethernet Network (LAN). This tool can set a new MAC address to your NIC, bypassing the original hard coded MAC address. Technitium MAC Address Changer is a must tool in every security professionals tool box. Technitium MAC Address Changer is coded in Visual Basic 6.0.

Remote Desktop Manager

http://remotedesktopmanager.com/

Remote Desktop Manager is an application used to manage all your remote connections. Add, edit, delete, organize or find your remote connection quickly. Compatible with Microsoft Remote Desktop, Terminal Services, VNC, LogMeIn and Team Viewer, Ftp, SSH, Telnet and more.

Open-AudIT-audit your network

http://www.open-audit.org/

Open-AudIT is an application to tell  you exactly what is on your network, how it is configured and when it changes. Open-AudIT will run on Windows and Linux systems. Essentially, Open-AudIT is a database of information, that can be queried via a web interface. Data about the network is inserted via a Bash Script (Linux) or VBScript (Windows). The entire application is written in php, bash and vbscript. These are all 'scripting' languages – no compiling with viewable source. Making changes and customisations is both quick and easy.

AutoScan-Network discovery Tool

http://autoscan-network.com/

AutoScan-Network is a network discovering and managing application. No configuration is required to scan your network. The main goal is to print the list of connected equipments in your network.

     Features:
•Multithreaded Scan
•Automatic network discovery
•Low surcharge on the network
•Simultaneous subnetworks scans without human intervention
•Realtime detection of any connected equipment
•Supervision of any equipment (router, server, firewall…)
•Supervision of any network service (smtp, http, pop, …)
•Automatic detection of known operatic system (brand and version), you can also add any unknown equipment to the database
•Complete network tree can be saved in a XML file.
•Intruders detection (in intruders detection mode, all new equipments blacklisted)
•Telnet Client
•Nessus Client
•Wake on lan functionality
•Privileged account is not required