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How do I get the IP address of a device not on a network?

asked 2020-10-06 15:46:47 +0000

DALE gravatar image

updated 2020-10-06 17:58:12 +0000

Guy Harris gravatar image

how do I find the ip of a device not on a network.My computer connected to device?

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How is the computer connected to the device, network cable, serial cable, parallel cable or something else?

grahamb gravatar imagegrahamb ( 2020-10-06 15:57:24 +0000 )edit

And what do you mean by "not on a network"? A machine that's not on a network might not have an IP address.

Guy Harris gravatar imageGuy Harris ( 2020-10-06 17:59:19 +0000 )edit

I have a device that has an ip but I do not know the range to search for,and not knowing the subnet cannot set my laptops subnet

DALE gravatar imageDALE ( 2020-10-07 14:06:36 +0000 )edit

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answered 2020-10-07 14:37:10 +0000

Jaap gravatar image

If it does have an IP address and is (perhaps occasionally) active you can run a capture on the network interface attached to it and filter on its MAC address, which you presumably have. Or if you don't and this is the only device on the network interface then anything coming in is from the device.

On the other hand, if it remains quiet, you'll have to see if you can provoke some response. Either by triggering something on the device which causes it to send packets, or if you're lucky it may respond to a broadcast ping.

If nothing else helps then a network scan, e.g. using nmap may help. Start with the usual suspects, as in, the private network ranges and go from there.

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Asked: 2020-10-06 15:46:47 +0000

Seen: 690 times

Last updated: Oct 07 '20