Under HP-UX, change the MAC address in SAM by selecting Networking and Communications, then selecting the interface, Action, Modify, and Advanced Options. It is possible to change the MAC address under OpenBSD with sea.c. OpenBSD does not, by default, allow users to change the MAC address. In Solaris, change the MAC address with the ‘ifconfig’ command. Under Linux, change the MAC address with ‘ifconfighw,’ or use the GNU MAC Changer (try finding it in your distribution’s repository). To change the MAC address via ‘regedit,’ alter the appropriate values in the ” NetworkAddress” that is located in the subkey of ‘HKEY_LOCAL_MACHINESystemCurrentControlSetControlClass Of course, Microsoft keeps moving the key location around! Alternately, try to alter the NIC card’s information, which can be done by going into the Properties Tab. To change a MAC address, find that key with ‘regedit’ and change it. Under Windows, the MAC address is stored in a registry key. How to Change a MAC address in Microsoft Windows The procedures for changing a MAC address are specific to each operating system.

One of the main reasons for doing this is to get around access control lists(s) on a specific router or server, either by hiding a certain device on a network or by allowing it to mimic another network device.

At times, users may want to change this MAC address to one of their choice. Every Ethernet card had a factory assigned MAC address burned into it when it was made.

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