Re: Find out if an IP address is in use on the LAN -- PCTECH

Subject: Re: Find out if an IP address is in use on the LAN
From: Buck Calabro <kc2hiz@xxxxxxxxx>
Date: Thu, 14 Aug 2014 13:52:05 -0400
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On 8/14/2014 12:51 PM, Jeff Crosby wrote:

I'm 99% sure the IP address 192.168.0.5 is not in use on our LAN, but I
want to be 100% sure.

I've pinged it and get no reply, but some things don't reply to a ping, do
they? Or because I used an actual IP address in the ping, is that a
definitive answer that it's not in use because I got no reply?

No, it's not definitive. Some devices deliberately don't answer ping.
It could also be rebooting, sleeping, powered off or showing the Blue
Screen of Death.

Is there a way? I'm on Windows 7.

I'd use Wireshark. Run it for a while and capture anything coming/going
to that IP address.
--buck

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Follow-Ups:

Re: Find out if an IP address is in use on the LAN , Jeff Crosby

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