These tools are available for free and are either being actively developed by community or their alternatives are provided.
With these tools, you can know which loopholes need to be fixed in your network.
Below are top 7 tools every hacker must possess.
Most hackers are aware of Nmap (Network Mapper) as a free open source utility for network exploration or security auditing. It helps in swiftly scanning large networks, Majority of systems and network administrators find this utility helpful to perform tasks related to network inventory, managing service upgrade schedules, and monitoring host or service uptime.
Nmap can run on different types of computers and both console and graphical versions are available. Not only Nmap is free, but is open source too. The tool can be useful for beginners (-sT) or by pros (packet_trace). In short, an extremely versatile tool, once you completely comprehend the results.
Nessus Remote Security Scanner
Earlier, Nessus was open source, but it’s still free. The tool works with a client-server framework. It is in fact the world’s most popular vulnerability scanner used by over 75,000 organizations across the world. Several leading organizations could realize major cost savings with the help of Nessus.
It is a GTK+-based Wiresharknetwork protocol analyzer, or sniffer, that allows you to describe and browse the contents of network frames. It aims at creating commercial-quality analyzer for Unix and to lend Wireshark those features which are missing from closed-source sniffers. The tool runs perfectly on both Linux and Windows and is easy to use. Moreover, it can rebuild TCP/IP Streams!
Cain and Abel
Often referred to as the Swiss knife of hacking tools, Cain & Abel is actually a password recovery tool used for Microsoft OS. It allows users to easily recover different types of passwords by sniffing the network, breaking encrypted passwords with the help of Dictionary, Brute-Force and Cryptanalysis attacks. It also helps in recording VoIP conversations, decoding twisted passwords, edifying password boxes, revealing cached passwords and analyzing routing protocols. The tool does not use any software vulnerabilities or bugs which are difficult to fix with little effort.
Kismet refers to an 802.11 layer2 wireless network detector, sniffer, and infringement detection system. The tool works with any wireless card that supports raw monitoring (rfmon) mode and can sniff 802.11b, 802.11a, and 802.11g traffic. It is a good wireless tool if your card supports rfmon
Here comes a reasonable wireless tool for Windows! However, it’s not as strong as its Linux counterparts, but is simple and features a NetStumbler nice interface. It is good for the basics of war-driving. NetStumbler is actually a tool for Windows OS that lets you to identify Wireless Local Area Networks (WLANs) with the help of 802.11b, 802.11a and 802.11g.
SuperScan is a powerful TCP port scanner, pinger, and resolver. It is an update of most famous Windows port scanning tool, SuperScan. Those looking for a substitute for nmap on Windows with a decent interface, can check out this tool.