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Directory (FLOSS/FOSS)

Networking Tools

• OCS Inventory [GNU GPL] - Open Computer and Software Inventory Next Generation is an application designed to help a network or system administrator keep track of computer configuration and software installed on the network.
• Nmap [GNU GPL] - Nmap ("Network Mapper") is a free open source utility for network exploration or security auditing. It was designed to rapidly scan large networks, although it works fine against single hosts. Nmap uses raw IP packets in novel ways to determine what hosts are available on the network, what services (application name and version) those hosts are offering, what operating systems (and OS versions) they are running, what type of packet filters/firewalls are in use, and dozens of other characteristics. Nmap runs on most types of computers and both console and graphical versions are available. Nmap is free and open source license.
• WinDump [BSD] - WinDump is the Windows version of tcpdump, the command line network analyzer for UNIX. WinDump is fully compatible with tcpdump and can be used to watch, diagnose and save to disk network traffic according to various complex rules. It can run under Windows 95, 98, ME, NT, 2000, XP, 2003 and Vista.
• Analyzer [BSD] - Analyzer is a fully configurable Network Analyzer for Win32. It includes several functionalities that are needed by network management operator. Analyzer is based on WinPcap and it is able to capture packets on most Win32 platforms (and link-layer technologies).
• Ethereal Network Analyzer [GNU GPL] - is used by network professionals around the world for troubleshooting, analysis, software and protocol development, and education.
• Wireshark [GNU GPL] - Wireshark is one of the world's foremost network protocol analyzers, and is the standard in many parts of the industry.
• Packetizer [GNU GPL] - Packetizer is a site devoted to packet-switched conversational communication. These are the protocols and systems that ultimately provide the means for humans to communicate with each other in both directions in real time over a packet-switched network.
• Show Traffic [BSD] - Show Traffic - monitors network traffic on the chosen network interface and displays it continuously. It could be used for locating suspicious network traffic or to evaluate current utilization of the network interface.
• daSniff [no license] - daSniff is an open source customizable sniffer for win32 systems. It helps you to log your LAN traffic by specifying packet rules as filters.
• Network Game Detect [BSD] - Show information about running game servers in your LAN. Currently four games are supported.
• Port scanner [GPL] - Small and fast port scanner without ANY stealth routines in it. (Full C source code included)
• ngrep [Other/Proprietary License] - ngrep strives to provide most of GNU grep's common features, applying them to the network layer. ngrep is a pcap-aware tool that will allow you to specify extended regular or hexadecimal expressions to match against data payloads of packets.
• Knocker [GNU GPL] - Knocker is a simple and easy to use TCP security port scanner written in C to analyze hosts and all of the different services started on them. It is available for Linux, FreeBSD, HP-UX, and Windows9x/2000/NT and it is licensed under the GNU General Public License GPL.
• NetBios Scan [GNU GPL] - NetBios Scan is a tool that scan ip ranges and search host with share resources.
• NetBIOS Enumerator [GNU GPL] - This application was suggested to show how to use remote network support and how to deal with some other interesting web technics like SMB.
• OpenVPN [GNU GPL] - OpenVPN is a full-featured SSL VPN solution which can accomodate a wide range of configurations, including remote access, site-to-site VPNs, WiFi security, and enterprise-scale remote access solutions with load balancing, failover, and fine-grained access-controls.
• DeeEnEs [GNU GPL] - This program is for those people who have an account at one of the website that provide dynamically updateable DNS entries for people who don't have a fixed IP address but still would like to have a host name where they can be reached.
• Dynksys Dynamic IP Updater [GNU GPL] - The Dynksys Dynamic IP Updater is a Java-based application that will determine your network's external IP address and update it to a dynamic host name service such as dhs.org or DynDNS.org.
• MyDyndns [GNU GPL] - DYNDNS client.
• SSL-Explorer [GNU GPL] - SSL-Explorer: Enterprise Edition is designed for security concious organizations who require dedicated commercial support and enhanced features above and beyond those provided in the free, open source Community Edition.
• Hardscan [GNU GPL] - Hardscan is a local netstat replacement that scans for open ports the hard way: by binding to each of them and attempting to handshake with itself. It is meant to be useful in a situation where you may have been rooted, rendering the output of netstat and other security tools untrustworthy.
• tcping [GNU GPL] - tcping.exe is a small console application that operates similarly to 'ping', however it works over a tcp port. Not a terribly interesting concept, but I had trouble finding a windows utility to do this that I was happy with.
• mturoute [Public Domain] - mturoute.exe is a small (~50k) executable that uses ICMP pings of various sizes in order to determine the MTU values on the path between itself and the target system.
• tsb [GNU GPL] - This is a python program that acts as a go-between between a telnet port and a serial port. In effect, this adds serial port connectivity to programs such as PuTTY, which lack it. As a secondary function, it could be used to share a serial port over the internet, if you needed such a feature.
• Scapy [GNU GPL] - Scapy is a powerful interactive packet manipulation program. It is able to forge or decode packets of a wide number of protocols, send them on the wire, capture them, match requests and replies, and much more. It can easily handle most classical tasks like scanning, tracerouting, probing, unit tests, attacks or network discovery.
• OpenRSM [GNU GPL] - A Lightweight, Open Source tool for Asset Management, Software Deployment, Remote Control and Network Monitoring, supporting all major desktop systems.
• Packetyzer - Packetyzer provides a Windows user interface for the well known Ethereal packet capture and dissection library. Ethereal is used by network professionals around the world for troubleshooting, analysis, software and protocol development, and education.

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