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 Identifying client machines

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davidpowell

Posts: 14
Posted: 05/28/2010, 3:25 PM

Hi,

I have developed an intranet that identifies users from their windows logon and their computers from their IP address, thereby allowing a dynamic telephone directory that relates to where that user is at that time - very useful in a hotdesking world.

It is important that the user doesnt have to logon beyond his windows logon - as none of my users can be bothered to do so and the computer / user identification must happen invisibly.

This all works fine on my LAN.

I want to expand this to other sites within my organisation ( I am just a GP, not a programmer).

However, I can no longer use the IP address for this function as the one presented to me from the routers are (obviously) all identical.

I have come across, but since lost, javascript which gets the MAC address of devices on the client PC - this would allow my intranet to idenitfy the location of the user. There are lots around using activex controls, but I dont want to enable these because of the security risks. The one I came across used pure javascript and seemed to work OK.

There are also lots of sites which say it cant be done - they are all wrong!

Does anyone have any nice simple code example of how it can be achieved, or where I could look for it?

I hope this makes sense!

David Powell
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David Powell
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lboeldt

Posts: 53
Posted: 07/05/2010, 11:23 PM

Try this function, if you get errors it is most likely because you don't have sufficient rights to the remote computer to get its mac address.

  
function getMac( strComputer )  
  
	dim str  
  
	Set objWMIService = GetObject("winmgmts:\\" & strComputer & "\root\cimv2")  
	Set colItems = objWMIService.ExecQuery _  
	  ("Select * From Win32_NetworkAdapterConfiguration Where IPEnabled = True")  
  
	For Each objItem in colItems  
		str = objItem.MACAddress  
	Next  
  
	getMac = str  
end function  
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