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What is Zenmap?

  • Zenmap is the official Nmap Security Scanner GUI. It is a multi-platform user. For example, it is compatible (Linux, Windows, Maxc OS X, BSD, etc.). It is free of charge and open-source application that aims to make Network Mapping (Nmap) easier for beginners to use while providing advanced features for experienced Nmap users.

  • Regularly used scans can be saved as profiles to make them easy to run often.

  • Scan results can be saved and viewed later. Saved scan results can be differentiated from one another to see how they vary. The results of recent scans are stored in a searchable database.

On which computer did you install Zenmap?

  • I installed Zenmap on my 2020 Apple Macbook Air as I felt installing it on my desktop would’ve taken too long since it is an older HP model; therefore, I used my newer and faster laptop.

What problems did you run into, and what solutions did you come up with?

  • Since I am on macOS, I ran into one main issue while using Zenmap, and it was opening the download package. An error came up saying, “cannot be opened because it is from an unidentified developer.” I have provided a screenshot of the error below.

  • Then I noticed in the lab instructions there was a link provided and above it said “Mac Users: Please check the following Apple web page to learn about how safely open apps on your Mac:” So I clicked it, and it gave me instructions on how to download Zenmap on macOS. So my problem was solved

What information did you learn about your network from running scans in Zenmap?

  • I learned how to view displays of ports running on a host or all hosts on a network and did it by sending packets and analyzing the responses.

  • Also learned how to store scans in a searchable database

  • From Zenmap and Nmap, I realized that they provide several features for probing computer networks, including host detection and service and operating system recognition.

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