![]() ![]() This can be useful for identifying vulnerabilities that are specific to certain operating systems.Ħ- Conducting stealthy and aggressive scans ![]() The -O option stands for « OS detection » and it allows to try and determine the operating system of the target host. The -p option is used to specify a range of ports to scanĥ- Detecting operating systems and version information # nmap -O 192.168.20.5 This can be useful for discovering services that may not be running on well-known TCP ports.Ĥ- Scanning a range of ports : # nmap -p 22,80,443 192.168.0.1 The -sU option stands for « UDP scan » which is used to scan for open UDP ports. This can be useful for evading detection by firewalls or intrusion detection systems.ģ- Scanning specific ports and ranges # nmap -sU The -sS option stands for « SYN scan » which is a stealthy scan that can be used to probe network hosts without actually establishing a connection. # nmap 192.168.0.1Ģ- Advanced nmap scan options : # nmap -sS for example, you can use nmap 192.168.0.1 to scan a single host, or nmap 192.168.0.* to scan a range of hosts. The basic syntax for using nmap is simply nmap, where is either a hostname or an IP address. On Ubuntu/Debian : # apt-get install nmap nmap commands > Processing Dependency: libpcap.so.1()(64bit) for package: 2:86_64 Loading mirror speeds from cached hostfile ![]() If nmap is not installed, you can install it by the command bellow : I already wrote an article on nmap in French, click here if you want to take a look at Installation In this article, we’ll go over 10 useful Nmap commands that you can use to scan your network and gather information about your systems. It can be used to scan networks, hosts, and ports to find out what services are running, what operating systems are being used, and what type of firewalls are in place. Nmap, short for Network Mapper, is a powerful tool for network discovery and security auditing. ![]()
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