Netcat is a multipurpose network debugging tool got an in-built port scanning feature. Nmap is a powerful open-source tool, and if interested in learning in detail, you may check out this complete Nmap ethical hacking course on Udemy. Nmap done: 1 IP address (1 host up) scanned in 3.03 ~]# Below example to scan ports from 80 to 444 ~]# nmap -p80-444 xx.xx.xx.xx To scan ports in the range, you can use -p syntax. To scan ports consecutively, you can use -r syntax. Nmap done: 1 IP address (1 host up) scanned in 1.93 ~]# Nmap scan report for xx.xx.xx.com (xx.xx.xx.xx) To scan ports in fast mode, you can use nmap -F $IPADDRESS command ~]# nmap -F xx.xx.xx.xx You can install on Windows, Linux, macOS, or build from source code. Nmap (Network Mapper) is one of the administrator’s favorite tools. TCP Port Scanner uses the SYN method and can scan up to 10,000 ports per second. Not every scanner will have them all, so choose what fits your requirement.Īs the name indicates – it is capable of scanning only TCP ports.
There are multiple methods of port scanning – TCP, FIN, ICMP, Idle, SYN, UDP, ACK, Windows, etc. Previously, I talked about how to scan ports on Internet-facing IP and received feedback to cover tools to scan the intranet network. Better to use tools to scan the ports faster. Well, if you are thinking about checking manually, it will take a lot of time. How do you know the available ports on a particular IP or IP range on your network? Scan thousands of ports in a second! Let’s see how network admins can do this.
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