![]() ![]() Get-NetNeighbor | Where-Object -Property state -ne Unreachable | where-object -property state -ne Permanent | Out-GridView The content of the ARP cache can be read out in PowerShell via the command “Get-NetNeighbor”. How to read the ARP cache with Windows PowerShell? The ARP cache lists all IP and MAC addresses of the local network with which the computer has attempted a connection, even if this was blocked by the firewall during the actual connection setup. So that the MAC addresses do not have to be queried again and again, these are kept by each device for a certain time in the "ARP cache". The unique network addresses of the devices = MAC addresses are used for direct communication. In the following YouTube video I show the commands in action:īackground: Network and commands in detail What is the ARP (Address Resolution Protocol) cache?Ĭomputers that are located in the same IP network - as an example in the subnet 192.168.0.x - communicate directly with each other and do not need a gateway (=router) for this. If the variant with PowerShell does not work for some reason, the line in the command prompt described further below can also be used: cmd-ping-arp. The command block can be easily pasted into the Windows PowerShell console, copy it to the clipboard (Ctrl+c):Ī “right click” in the PowerShell pastes the content and starts the commands the last line must then still be confirmed with “Enter”: $(Get-NetIPAddress | where-object | Out-GridView The following commands search for all existing class C networks, start a ping on their addresses (1.254) and display the IP addresses contained in the ARP cache including hostname as Out-GridView: ![]() No software needs to be installed to do this. Simple commands in PowerShell can quickly create a list of all devices on the network. Out-GridView in PowerShell displays the collected data in an interactive table. In addition to the IP address, the host name can be added to the device list with Resolve-DnsName. The command Get-NetNeighbor shows the ARP cache and thus all contacted devices of the local network. For a complete listing of all devices in the local network it therefore helps to contact all possible addresses in advance: Ping all devicesĬontact all devices on the network using the ping command to fill the ARP cache. The ARP cache lists all devices with which the PC has recently had a network connection. For expanding your own network, see also: Set up network for home: Expand and improve your LAN / Wi-Fi. If you would like to see the commands in action, you can do so in my YouTube video. The PowerShell commands presented at the beginning of this post give a quick overview of all devices on the local network and may make special programs for scanning the network unnecessary. If you want to get a quick overview of all active devices in a network, you can do this with network discovery, commands in the command prompt, in PowerShell or with special IP scanners. ![]()
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