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. 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. Various scan typesīased on the system admin requirement or any user, nmap can perform different types of the scan to get the desired result. For instance, Nexpose is an application that is used nmap internally to find out the vulnerabilities of any network. Several other applications use nmap in behind in order to determine all the services. One just needs to feed the IP address of the target that is required to be scanned, and the entire services will be scanned. Nmap is the inbuilt tool in Kali Linux, which is very easy to use. The following are the advantages of network mapper: 1. Based on the outcome, the system analyst can determine if the system has any vulnerability. At the last of the scam, it also shows the total time it required to complete the scan.
Here, we have just used the command nmap 162.215.248.160, 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. 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. The command that has been executed in the terminal of Kali Linux has the nmap keyword, which is used to initiate the nmap scanning. 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. are open, which are running ftp, ssh, domain, pop3, respectively. It shows that ports like 21, 22, 53, 118, etc. Some of the ports are open while some are closed, but no filtered ports are there based on the normal scan. In the above picture, it is visible to us that several services are up in the server.
Some services 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. The IP belongs to a live server running various services to help the users of that server leverage the advantage of the server.
In this section, we will be considering an example where we will perform an actual scan on an active IP to understand all the active services on that system. It declares the scan result in front of the security analyst so that they can verify the things. Nmap actually analyses the response from the server to find out the services and the ports open. One can scan all the available ports using nmap, but nmap scans only the default ports in the usual case. It utilizes the ICMP scan to identify the network’s speed, and based on the speed it processes the scan request submitted by the user. Nmap can also be considered as the inbuilt tool in Kali Linux that offers an edge to conduct security checks.
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