![]() If you are curious about the status of the ports on your Linux PC, or other network devices on the network, you may want to scan the open ports and close all those you are not using. Leaving vulnerable, open network ports are dangerous having ports of this type open is an excellent way for unwanted intruders to gain access to their systems. The software is usually found in the repositories of the leading Linux distributions. Many people in the security industry use it, and as a result, it is easy to install on most of the available Linux operating systems. The results of the recent analyzes are stored in a database. The results of the saved analyzes can be compared with each other to see how they differ. The results of the analysis can be saved and viewed later. Frequently used scans can be saved as profiles so that they are easy to execute repeatedly. This is a free and open source multiplatform app (Linux, Windows, Mac OS X, BSD, etc.) that aims to make Nmap easy to use for beginners while providing advanced features for experienced Nmap users. When it comes to port exploration, Zenmap is king. Zenmap is the official Nmap GUI, with which you can perform the different types of analysis that we are allowed to do with Nmap. It is used to evaluate the security of computer systems, as well as to discover services or servers in a computer network, for which Nmap sends defined packages to other computers and analyzes their responses. Nmap is one of the most used tools and primarily known in Linux that serves to perform port tracking. With great power comes great responsibility.Do you want to scan open ports easily? Well, check this tutorial about how to download, install and use Zenmap, the nmap GUI. But remember that a tool and a weapon are often only separated by the intent with which they are used. They’re free and open source, which pushes them even closer to perfection. No tool is perfect, but Nmap and Zenmap come pretty close to the perfect network discovery tools. It is a powerful tool for hackers as well, which is why its use is often scrutinized and frowned upon in some settings. You can detect open ports, operating systems, and service versions with it. Zenmap is a professional security tool that provides you with a great deal of information about your network and its components. This article provides a very brief scratch-the-surface overview of Zenmap. Zenmap and Nmap are cross-platform tools that are essential for security professionals, as well as any system administrator with security responsibilities. The Profile Editor requires that you name a new Profile or you have to Cancel and lose your changes. You can selectively edit the Profile or save the changes as a new Profile. Once you’ve saved the Profile, you can use it to scan at any future time by selecting it from the Profile drop-down list. And the standard is -v (verbose mode), which you definitely want regardless of your scan purpose to acquire the most information possible about your target or targets.įigure 2 shows the results of my scan of a Windows 10 system.įigure 6: Zenmap Profile Editor Scan options tab. This option is not recommended when you want to scan a network with a bit of stealth. There is no need to add these options if you use –A. The –A option is an aggressive scan that includes other options such as OS detection, version scanning, script scanning, and traceroute. The documentation recommends level 4, which is right for most authorized network scans on today’s faster (1GbE) networks. Even segmented /22 networks can take hours to scan and that’s not realistic for everyday security scanning. Timing values in the 0- 2 range are less likely to set off network IDS alarms they also take a long time to run, especially if the network is large. The levels range from 0 to 5 (see Table 1). The –T4 parameter is a timing template, and 4 is the level (aggressive). In the Command field, you see nmap –T4 –A –v. While that Intense scan runs, let’s take a closer look at it. It will take a few minutes for the scan to complete. For an initial test, select an IP address or a hostname on your network, enter it into the Target field, and click Scan. The target can be a single host, a network, or a web address. You only have to supply a target for the scan. Zenmap’s default scan setting is Intense Scan, and the command-line equivalent of that command is shown in the Command field.
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