Whether you are a private user with important information on your system, a major corporation, or a government agency protecting a wealth of highly sensitive data, Nmap can provide the level of knowledge and pre-emptive thought required to keep things safe. Hackers can gain access to uncontrolled ports on a system. network for open ports and other weaknesses. This program is open-source and free, it is one of the most common tools used for scanning. Internet security companies use Nmap to scan a system and understand what weaknesses exist that a hacker could potentially exploit. Nmap is a tool that comes in use for network scanning as we have seen above. For the same, we can use the below command: sudo nmap -p 80 Īlso if we want to scan a particular port like TCP then we can use the command below: sudo nmap 8.8.8.8 If we want to scan a specific port and also want to list out its details then we can use Nmap here. To find the routes and hosts interface information, we can use the below command to perform the scan: sudo nmap -iflist Scaning a specific port using It will perform a fast scan for the ports listed in Nmap services by using the below command: sudo nmap -F Finding Host Interfaces and routes To find a live host, Just type the below command in the terminal: sudo nmap -sP Performing Fast Scan To check if the local host is using any Firewall, type “-sA” in the terminal: sudo nmap -sA How to find a Live Host If you want to get OS details, you can use “-O”: sudo nmap -O Firewall Detection The tool helps to detect operating system and version as well running on the localhost. It is easy to specify the IP range using the Nmap scanner tool, use the command given below: nmap OS Detection So, type command in terminal: nmap -v Using Nmap with IP address Range The -v command is used to get a more elaborative detail about the connected machine. For scanning a hostname, type the below command in the terminal: nmap How to scan IP address using Nmap Command sudo nmap How to Use verbose mode with Nmap To perform a scan using hostname and IP address is the best way to run commands. Open the terminal and type: sudo apt install nmapįor verifying the installation, type the below command in the terminal: nmap -version How to Scan Hostname = So it should be installed on your system. First, we will see the command line tools natively available on Ubuntu 20.04 for scanning a network then, we will see a gui program build for this purpose. How to Install Nmap Commandįirstly, we have to install Nmap before exploring it. Nmap is designed to scan systems rapidly but comes with the drawback that it works fine only against single hosts. It uses raw IP packets in novel ways to determine what hosts are available on the network, what services those hosts are offering, what OS they are running. It is useful for many systems and network administrators for tasks like network inventory, managing service upgrade schedules, and monitoring host or service uptime. The Nmap or Network Mapper is an open-source tool that is used for network discovery and security auditing.
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