That means you can run a scan, see the results, and then decide whether to save them to a file. This allows administrators to easily track new hosts or services appearing on their networks, or existing ones going down.ConvenienceZenmap keeps track of your scan results until you choose to throw them away. You can see what changed between the same scan run on different days, between scans of two different hosts, between scans of the same hosts with different options, or any other combination. The results of several scans may be combined together and viewed at once.ComparisonZenmap has the ability to show the differences between two scans. Zenmap can even draw a topology map of discovered networks. It summarizes details about a single host or a complete scan in a convenient display. Here are some of the advantages Zenmap offers over plain Nmap.Interactive and graphical results viewingIn addition to showing Nmap's normal output, Zenmap can arrange its display to show all ports on a host or all hosts running a particular service. Therefore the purpose of Zenmap is not to replace Nmap, but to make Nmapmore useful. The nature of a frontend is that it depends on another tool to do its job. For the parts of this guide that deal specifically with Nmap (command-line options and such), refer toChapter15,Nmap Reference Guide.The Purpose of a Graphical Frontend for NmapNo frontend can replace good old command-line Nmap. This guide is meant to make Nmap and Zenmap easy to use together, even if you haven't used either before. See theofficial Zenmap web pagefor more screen shots.Figure12.1.Typical Zenmap screen shot A typical Zenmap screen shot is shown inFigure12.1. The results of recent scans are stored in a searchable database. Saved scans can be compared with one another to see how they differ. Scan results can be saved and viewed later. A command creator allows interactive creation of Nmap command lines. Frequently used scans can be saved as profiles to make them easy to run repeatedly.
It is a multi-platform, free and open-source application designed to make Nmap easy for beginners to use while providing advanced features for experienced Nmap users. Zenmap Gui Users' GuideINTRODUCTIONZenmap is the official graphical user interface (GUI) for the Nmap Security Scanner.