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I want to list the computers that are connected to network in which I am connected.

Anyone know that how to do so ?

I need this help soon, because I have made my connection open/ password free to know how many computers uses my network.

Any help please.

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  • Best place would be to check at your router.
    – Journeyman Geek
    Jan 18, 2014 at 10:47

3 Answers 3

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You should download and install a program called nmap. This is the most effective and secure way to do that. A command like:

  nmap -sn 192.168.1.0/24 

will list all pcs on the subnet 192.168.1.0/24 (adapt this to your needs). To get a glimpse of all the things nmap can do, issue the command:

  nmap -T5 -A 192.168.1.137

where you will have to substitute 192.168.1.137 wi the IP address of the pc you want to explore. See how many things nmap is capable of unearth for you!

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Going to Network (from the left navigation pane on any explorer window, or the start menu), should show devices (http://windows.microsoft.com/en-gb/windows/view-network-computers-devices#1TC=windows-7 ).

However I have found that to be fairly unreliable (devices can choose to not be "discoverable").

Your router however should give you a full list of (directly) connected wifi and Ethernet devices (depends on your router where), although it is technically possible to fool this as well (use a hostname you personally think is OK, or even spoof the address of a system that should be on the network). So from a security standpoint I still wouldn't trust it.

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  • Incomplete: a router will not display among leases pcs on static IPs, simply because they don't lease anything. Jan 18, 2014 at 13:44
  • Depends on the router, mine shows a list of connected WiFi devices by MAC (but not ethernet ones, bit harder to locate currently active ethernet devices, although another I use shows both lists together nicely...) regardless of if the ip address was static or dynamic. Also the DHCP page lists the permanent allocations along with the remaining dynamic leases.
    – Will
    Jan 18, 2014 at 14:07
  • Your router shows a list of active pcs connected to the network, where active means within a TTL (=Time To Live), which need not be long. A pc might be idle for a longer time than TTL, it would not show in the router list, but it would show up in a nmap scan. Jan 18, 2014 at 14:23
  • Perhaps on Ethernet, but for WiFi is it possible for a device to time out and still be considered connected?
    – Will
    Jan 18, 2014 at 15:57
  • Also dont think nmap will work with some firewall configs (not on a the network right now, but the router/firewall config blocks "guest" devices from communicating with the rest of the subnet, it only allows tcp/udp packets to/from the internet gateway)
    – Will
    Jan 18, 2014 at 17:14
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Easier thing would be to check out your Modem/Router's DHCP page for leases. It can usually be found at 10.0.0.1 or 192.168.1.1. You can be sure by using the ifconfig command on unix like systems.

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  • Incomplete: a router will not display among leases pcs on static IPs, simply because they don't lease anything. Jan 18, 2014 at 13:45

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