- Wireshark is a network protocol analyzer that allows you to see the details of your network at a microscopical level.
- Nmap is a network mapping tool that allows you to identify active devices and the corresponding services on a network.
- Snort is an open-source network intrusion detection software that looks for suspicious activity in network traffic.
- Nessus is a vulnerability scanner that helps to identify weaknesses in network infrastructure.
- Metasploit is a framework that allows you to develop and execute exploit code against a target computer system.
- Aircrack-ng is a set of tools that can be used to audit wireless networks.
- John the Ripper is a password cracking tool that uses dictionary attack and other techniques to guess passwords.
- Burp Suite is a web application security tool that helps to identify web application vulnerabilities.
- tcpdump is a command-line tool that captures and analyzes network traffic.
- Maltego is a forensic tool that helps to identify relationships between individuals, companies, or other entities.
- Telnet – A network communication tool that allows remote servers to be connected and commands to be run.
- Netstat – A command-line tool that displays active networks connections and the corresponding statistics.
- Tripwire – A file integrity monitoring tool that helps to identify files in critical systems.
- Sysinternals Suite is a suite of Microsoft Windows utilities that can assist with various tasks including security and troubleshooting.
- OpenVAS is a vulnerability scanner that helps to identify weaknesses in network infrastructure.
- Kismet is a wireless network sniffer which helps to identify wireless networks and the corresponding statistics.
- Nessus is a vulnerability scanner that helps to identify weaknesses in network infrastructure.
- SolarWinds Network Performance Monitor is a network monitoring tool that can help identify and fix network performance problems.
- Whois is a command-line utility that allows you to search for information about domain names or IP addresses.
- OSSEC – An open-source, host-based intrusion detection software that monitors application and system logs for suspicious activity.