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    <p>There can be two alternatives.</p> <ol> <li><p>You can get the MAC address using the code snippet you gave before and check if that MAC address belongs to any NIC (Network Interface Card). If it doesn't belong to one, then the MAC address is obviously spoofed. Here is the code that Locates the NIC using a MAC adress</p> <pre><code>using System.Net.Sockets; using System.Net; using System.Net.NetworkInformation; string localNicMac = "00:00:00:11:22:33".Replace(":", "-"); // Parse doesn't like colons var mac = PhysicalAddress.Parse(localNicMac); var localNic = NetworkInterface.GetAllNetworkInterfaces() .Where(nic =&gt; nic.GetPhysicalAddress().Equals(mac)) // Must use .Equals, not == .SingleOrDefault(); if (localNic == null) { throw new ArgumentException("Local NIC with the specified MAC could not be found."); } var ips = localNic.GetIPProperties().UnicastAddresses .Select(x =&gt; x.Address); </code></pre></li> <li><p>Get the network card address directly.</p> <pre><code>a. NWIF = dotnetClass "System.Net.NetworkInformation.NetworkInterface" b. the_Mac_array = NWIF.GetAllNetworkInterfaces() -- this is an array of all the Networks c. the_PhysicalAddress_Array = #() d. for net in the_Mac_array where (net.NetworkInterfaceType.toString()) == "Ethernet" do append the_PhysicalAddress_Array ((net.GetPhysicalAddress()).toString()) e. print the_PhysicalAddress_Array </code></pre></li> </ol> <p>(( I found it here <a href="http://snipplr.com/view/23006/" rel="noreferrer">http://snipplr.com/view/23006/</a> )) </p>
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    1. POHow to detect the original MAC address after it has been spoofed?
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    1. USHUNKY_Monkey
    1. USHUNKY_Monkey
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    1. CODoes this method work when the MAC address is being spoofed?
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      1. USGuvante
    2. CO@Guvante, No it doesn't. It'll show you that the spoofed MAC address belongs to the corresponding NIC. In fact, every code I have worked with so far retrieve the current MAC address, not the original one which was assigned at the factory.
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      1. USSajib Mahmood
    3. COYour Answer didn't work But you are the only person who tried to give the actual answer of this question.. So I decided to give the bounty to you.. :)
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      1. USAbdur Rahman
 

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