![]() ![]() ![]() Or by first su‘ing to the root user (type su and then type the root user password). Because Nmap requires some administrative access to use certain functionalities, you will want to launch Zenmap from the command line like so: There is a catch with the startup of Zenmap. Once installed you will find the tool in Applications > Network. Just mark Zenmap for installation and your package manager will pick up the Nmap requirement automatically. You will find both of these tools in your Add/Remove Software tool. Installation of Zenmap is simple (you will need to also have Nmap installed). In this case that is very much true because Zenmap will give you an interactive graphical map of your network. And besides, as they say “A picture is worth a thousand words”. Although Nmap is incredibly powerful, when working with larger networks most administrators do not want to work with command line only tools. Nmap is an open source tool for network security and auditing. The Zenmap tool is actually a graphical front end for the very popular Nmap command line tool. But what happens when that network outgrows your ability to simply walk around and manually make note of what is up/down, what OS a device is running, or what ports are open? When this happens you need to make use of one of the de facto standard open source network auditing tools - Zenmap. This isn’t a problem if you have a small network. What if you want to scan ALL ports of the IP range under scope.Network administrators have many tasks, and auditing the network is at the top of the heap. The simple default scan above will check the 1000 most well known ports for each IP address. Nmap 192.168.10.0/24 Scan all ports of an IP range Nmap 192.168.10.* 4) Specify a scan range of IPs using a subnet notation ![]() Nmap done: 131 IP addresses (2 hosts up) scanned in 6.52 seconds 3) Specify a scan range of IPs using a wildcard Starting Nmap 7.12 ( ) at 22:03 GTB Daylight Time Nmap done: 3 IP addresses (3 hosts up) scanned in 11.46 seconds 2) Specify IPs in consecutive range MAC Address: 00:08:9B:8B:F5:EB (ICP Electronics) Starting Nmap 7.12 ( ) at 21:55 GTB Daylight Time There are four ways to scan multiple IP addresses: 1) Specify IPs one-by-one separated by space In this default scan, nmap will run a TCP SYN connection scan to 1000 of the most common ports as well as an icmp echo request to determine if a host is up. The default scan of nmap is to run the command and specify the IP address(es) without any other options. Now let’s go ahead and see several nmap options to scan multiple IP addresses in a network.
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