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Network Mapper

Tags: nmap scan network

Network Mapper

Introduction to Network Mapper

In the world of cyber crimes, it is very important to make sure that the system of any organization is highly secured to ensure its business continuity. It might interest you that to ensure the security level of the system, the organization opts for some of the software that runs scans on to find out the vulnerabilities. Software has made it very easy for enterprises to evaluate their security strength. Now the question comes in, what exactly is running behind the software that creates a system that scans the other system and gets the list of existing weaknesses. For most of such scanning applications, they run Nmap in behind. Here we will explore lots of things about network mapper. So let’s get started.

What is Network Mapper?

Nmap may be defined as the network vulnerability scanner which identifies all the services running on several ports. It states whether the ports are open, closed or filtered based on the responses it receives from different kinds of scans. TCP scan, UDP scan, Stealth scan are some of the types of scans that one can perform using the nmap. It first estimates the speed of the network and based on the network speed, it performs the scan to the system. There are some of the applications like expose which runs the nmap behind.

Nmap can also be considered as the inbuilt tool in Kali Linux that offers an edge to conduct the security checks. It utilizes the ICMP scan to identify the speed of the network and based on the speed it processes the scan request submitted by the user. One can scan all the available ports using nmap but in the usual case, nmap scans only the default ports. Nmap actually analyses the response from the server to find out the services and the ports open. It declares the scan result in front of the security analyst so that they can verify the things.

Working with Network Mapper

In this section, we will be considering an example where we will perform an actual scan on an active IP to understand all the services that are active on that system. The IP belongs to a live server that is running various services to help the users of that server to leverage the advantage of the server. There are services that are supposed to be run on the particular port, so when the nmap scan for the defaults ports, it actually checks the common services which are expected to be more juicy than others.

working of Nmaps

In the above picture, it is visible to us that there are several services up in the server. Some of the ports are open while some are closed but no filtered ports are there based on the normal scan. It shows that ports like 21, 22, 53, 118, etc are open which are running ftp, ssh, domain, pop3 respectively. The scan performed in the above image is the default scan as we have not selected if any specific type of scan like TCP, UDP, Stealth or so on scans.

The command that has been executed in the terminal of Kali Linux has the nmap keyword which is used to initiate the nmap scanning. There are additional attributes like -sS, -sT, -sU which can be used together with the nmap keyword to make it scan the target system in the desired manner. Here, we have just used the command nmap and as the outcome, nmap presented all the port information in front of us which is ample to state how easy it is to work with nmap. At the last of the scam, it also shows the total time it required to complete the scan. Based on the outcome, the system analyst can determine if the system has any vulnerability.

Advantages of Network Mapper

The following are the advantages of network mapper:

1. Easy to use

Nmap is the inbuilt tool in the Kali Linux which is very easy to use. One just needs to feed the IP address of the target that is required to be scanned and the entire services will be scanned.

2. Base for several applications

There are several other applications that use nmap in behind in order to determine all the services. For instance, Nexpose is an application that is used nmap internally to find out the vulnerabilities of any network.

3. Various scan types

Based on the requirement of the system admin or any user, nmap can perform different types of scan to get the desired result. For example, there is an option of performing the stealth scan which is there to make sure that the scanning on target should not make much noise in the network to invoke the log generation.

4. Network vulnerability scanning

Using nmap is all about finding the services running in the ports and the status of ports but eventually, the information produces as the outcome of scanning can be used to determine the vulnerabilities in the system.

Career Growth – Network Mapper

Anyone who wants to make their career in the domain of security is supposed to have the working idea of all the inbuilt tools available in Kali Linux which are specially made available for security testing. If it comes to having a working idea of the inbuilt tools, nmap comes in the first position. It is very useful while gathering details about the target so that based on that they can determine what kind of attack will be suitable to the target.


Nmap is the inbuilt network scanning tool available in Kali Linux which is leveraged by the security professionals to safeguard the network. It is very easy to use and anyone concerned with network vulnerability assessment can learn this to get some sharp edge in their career. There are other applications as well that run nmap in order to perform network scanning. There are different levels on which it can be used. A new user can use it as a beginner usually explores the new thing and the professionals can use it to the advanced level based on their expertise.

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This has been a guide to Network Mapper. Here we discuss the Key Concept, working, career growth and advantages of Network Mapper. You can also go through our other Suggested Articles to learn more –

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