![]() In some cases you might also get the hostname from SNMP using the snmp-interfaces script but that will require UDP port 161 to be open. Through the Nmap tool, you can scan the report of all devices connected to a network by providing the subnet mask IP as follows: nmap -sP 192.168.100.0/24 The output shows that three devices are connected to the network: the router itself, the Linux system I use on my laptop, and my phone. Or you can just run the specific nbstat.nse script and gain time and effort. Open your terminal and enter the following. ![]() Don't expect to get the hostnames of all the machines that you scan. This recipe describes how to perform a ping scan, to find live hosts in a network by using Nmap. You can use a service discovery scan since it will execute several scripts(one of which is nbstat.nse) and will return hostnames. There is a wealth of parameters but each serves a special purpose. Everything on the Nmap command-line that isnt an option (or option argument) is treated as a target host specification. This is basically what you need to answer your question and get what you wanted. For addresses on the same data link, it uses ARP requests, which are basically impossible to ignore. ![]() As root, you run Syn and don't have to finish the 3-way handshake. TheCleaner at 13:39 2 Grant Nmaps host discovery scan (sometimes called 'ping scan') sends lots of different probes, not just ICMP Echo Requests. A basic Nmap command will produce information about the given host. To see hostnames and MAC addresses also, then run this as root otherwise all the scans will run as a non-privileged user and all scans will have to do a TCP Connect (complete 3-way handshake) to get something. Nmap Command to Scan for Open Ports When scanning hosts, Nmap commands can use server names, IPV4 addresses or IPV6 addresses. This scan option uses a combination of scan techniques to. Now assuming your Ip is 192.168.0.100 and your mask is 255.255.255.0 then you can scan 1-254 like so nmap -sn 192.168.0.1-254 Nmap run completed 256 IP addresses ( 7 hosts up ) scanned in 4 seconds In 4 seconds, Nmap found the five live hosts on the network. This is a ping scan to identify live hosts in the specified range. Use ifconfig for this and use regexp to clean the results Since there is no given IP for the LAN we could assume it is 192.168 but that's not always the case, so the first thing is to discover our IP address and our subnet mask. Nmap finished: 256 IP addresses (256 hosts up) scanned in 7.491 seconds
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