Top 15 Free Tools

1. Nmap


Nmap ("Network Mapper") is a free and open source () utility for network discovery and security audits. Nmap uses raw IP packets in novel ways to determine what hosts are available on the network, what services (appliion name and version) those hosts are offering, what operating systems (and OS versions) they are running, what type of packet filters / firewalls are in used, and dozens of other characteristics.


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2. Wireshark
Wireshark is a network protocol analyzer. It lets you capture and interactively browse the traffic running on a computer network....

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3. Metasploit Community edition


Metasploit Community Edition simplifies network discovery and vulnerability verifiion s, incrsing the effectiveness of vulnerability scanners. It helps prioritize repairs and eliminate false positives, providing true security risk lice.
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4. Nikto2

Nikto is an Open Source (GPL) web server scanner which performs comprehensive tests against web servers for multiple items, including over 6400 potentially dangerous files / CGIs, checks for old versions of over 1200 servers, and version specific problems on over 270 server. It also checks the server configuration items such as the presence of multiple index files, HTTP server options, and will attempt to identify the web server and the software installed.Download DiSini
5. John the Ripper
John the Ripper is a fast , currently available for many flavors of Unix, , DOS, BeOS, and OpenVMS. Its primary purpose is to detect wk Unix s. Besides several crypt (3) hash types most commonly found on various Unix systems, supported out of the box are LM hashes, plus lots of other hashes and ciphers in the community enhanced version.
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6. Ettercap

Ettercap is a comprehensive suite for man in the middle attack. It ftures sniffing live connections, content filtering on the fly and many other interesting tricks. It supports active and passive dissection of many protocols and includes many ftures for network and host analysis.Download DiSini
7. NexPose Community edition

The NeXpose Community Edition is, single-user vulnerability management solution for free. NeXpose Community Edition is powered by the same scan engine as NeXpose Enterprise and offers many of the same fturesDownload DiSini
8. NNet is a full-ftured networking utility which rds and writes data across the network from the command line. N was written for the Nmap Project reimplementation much better than the venerable Net. Using TCP and UDP for communiion and is designed to be a back-end tool that can be relied upon to immediately provide network connectivity to other appliions and users. N will not only work with IPv4 and IPv6 but provides the user with a virtually unlimited of potential benefits.

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9. Kismet
Kismet is an 802.11 layer2 wireless network detector, sniffer, and intrusion detection systems. Kismet will work with any wireless card which supports raw monitoring (rfmon) mode, and (with appropriate hardware) can sniff 802.11b, 802.11a, 802.11g, and 802.11n traffic. Kismet also supports plugins which allow sniffing other media such as DECT.

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10. w3af
w3af is a Web Appliion Attack and Audit Framework. The purpose of this project is to crte a framework to find and web appliion vulnerabilities that is sy to use and extend.

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11. inging is a command-line oriented TCP / IP packet assembler / analyzer. The interface is inspired to the ping (8) unix command, but ing is not only able to send ICMP echo requests. It supports TCP, UDP, ICMP and RAW-IP protocols, has a troute mode, the ability to send files between a covered channel, and many other ftures.
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12. Burpsuite
Burp Suite is an integrated platform for testing the security of web appliions. Various tools that work smlessly together to support the entire testing process, from initial mapping and analysis appliion attack surface, through to finding and ing security vulnerabilities.
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13. THC-Hydra
A very fast network logon which support many different services.
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14. sqlmap
sqlmap is an open source penetration testing tool that automates the process of detecting and ing SQL injection wknesses and taking over of database servers. It comes with a powerful detection engine, many niche ftures for the highest penetration tester and various switches that lasted from fingerprint databases, take over the data from the database, to accessing the underlying file system and executing commands on the operating system via out-band connection.
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15. WebscarabWebScarab has a large of functions, and thus can be very intimidating for new users. But, for the simplest case, intercept and modify requests and responses between the browser and the HTTP / S server, there is not much to be lrned.