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Is there a way to get a list of all valid IP addresses in a local network?
I mean all IP addresses that each user is using in the network.
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Probably the best way is to use NMAP (http://nmap.org/) in ARP Ping scan mode. The usage will be something like nmap -sP -PR 192.168. 0. * (or whatever your network is).
From the desktop, navigate through; Start > Run> type "cmd.exe". A command prompt window will appear. At the prompt, type "ipconfig /all". All IP information for all network adapters in use by Windows will be displayed.
The formulas and rules are discussed below. To calculate the number of possible subnets, use the formula 2n, where n equals the number of host bits borrowed. For example, if three host bits are borrowed, then n=3. 23 = 8, so eight subnets are possible if three host bits are borrowed.
Install nmap,
sudo apt-get install nmap then
nmap -sP 192.168.1.* or more commonly
nmap -sn 192.168.1.0/24 will scan the entire .1 to .254 range
This does a simple ping scan in the entire subnet to see which hosts are online.
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Try following steps:
ipconfig (or ifconfig on Linux) at command prompt. This will give you the IP address of your own machine. For example, your machine's IP address is 192.168.1.6. So your broadcast IP address is 192.168.1.255.ping 192.168.1.255 (may require -b on Linux)arp -a. You will get the list of all IP addresses on your segment.
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