![]() We can write our own scripts and use them with Nmap. The great thing that I like about Nmap is its scripting engine (NSE). Nmap has the ability to save scan results to files and we can use these files for later analyzes. Both Nmap and Zenmap are multi-platform (Linux, Windows, Mac OS, BSD, etc.), so you do not have to worry about the operating system you need in order to use these tools. It is a command line tool but for those that do not like to remember many commands there is a graphical version of Nmap that is called Zenmap. Nmap can help us to discover how many hosts are in a network, what operating systems are they running, what open ports do they have and services running in these open ports. Network administrators find it very useful in their daily job, so if you are planning to be a network administrator you should learn how to use Nmap. Nmap is a free and open-source tool for network discovery, helping us to map the network. Ask yourself these questions: “Is there anybody outside using my wireless internet connection? Are my machines and devices secure? Is my router firewall working? Why is this port open? Is there any virus in my computer that opened that port?”. Monitoring the ‘health’ of your network is an important step to keep attacks, viruses and malware out of your network perimeter. You need to provide security to machines connected to your network, especially if you have a wi-fi network. If you run a network small or big, you need a flexible and productive way to monitor network traffic. Who should read this article? Everyone who is interested in computer security and computer networking.
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