Following are the list of security tools that can help you on securing your systems and network.
Nmap ("Network Mapper")
Nmap is a free and opensource utility for network discovery and security auditing. Nmap supports dozens of advanced techniques for mapping out networks filled with IP filters, firewalls, routers, and other obstacles. This includes many port scanning mechanisms (both TCP & UDP), OS detection, version detection, ping sweeps, and more. Nmap is available for free download, and also comes with full source code that you may modify and redistribute under the terms of the license.
Ncat is a feature-packed networking utility which reads and writes data across networks from the command line. Ncat was written for the Nmap Project as a much-improved reimplementation of the vulnerable Netcat.
tcpdump is a common packet analyzer that runs under the command line. It allows the user to display TCP/IP and other packets being transmitted or received over a network to which the computer is attached.
Wireshark is the world’s foremost and widely-used network protocol analyzer. It lets you see what’s happening on your network at a microscopic level and is the de facto (and often de jure) standard across many commercial and non-profit enterprises, government agencies, and educational institutions.
osquery is an operating system instrumentation framework for Windows, OS X (macOS), Linux, and FreeBSD. The tools make low-level operating system analytics and monitoring both performant and intuitive. Windows, macOS, CentOS, FreeBSD, and almost every Linux OS released since 2011 are supported with no dependencies. osquery powers some of the most demanding companies, including Facebook. Osquery is released under the Apache License.
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