This is the best network analyser tool. Wireshark enables you to inspect real-time data on a live network. You can dissect packets of data into frames and segments with Wireshark. It also supports all major network protocols and media types. You can use Wireshark as a packet sniffing tool if you are on a public network. The tool will have access to the entire network connected to a router.
This tool is designed for penetration testers. The networking scanning tool helps you learn more about the target. Nmap offers all the necessary insights including open ports, services, and the OS running on victim’s computer. Penetration testers prefer using Nmap for its simplicity, flexibility and extensibility.
Metaspoint is a complete framework that you can use during penetration testing cycle. This tool contains exploits for most of the vulnerabilities. You can send payloads to the target system and gain access to it through command-line interface. The tool was open source till 2009. You can access free community edition and use all the features even now.
This open source tool can perform extensive web server scans. Nikto allows you to scan harmful files, misconfigurations, outdated software installations etc. The tool checks for the presence of multiple index files, HTTP servers and pre-installed web server software. The tool is preferred for general web server security audits. You can easily scan large web servers with this tool.