This image is from Wikipedia – MAC address page and licensed under the Creative Commons Attribution-Share Alike 2.5 Generic, 2.0 Generic, and 1.0 Generic license. Look at the image below to understand it better. This is not a unicast address as the first octet needs to be even. SIOCSIFHWADDR: Cannot assign requested address SIOCSIFHWADDR: Device or resource busy - you may need to down the interface You need root permissions to alter the network interface. $ macchanger -lĠ010 - 00:00:0a - Omron Tateisi Electronics Co.Ĭommon problems $ ifconfig eth0 hw ether 02:00:01:00:00:02 $ sudo macchanger -p eth0ĭisplay a vendor MAC address list to choose from. Set another MAC address of the same vendor. $ sudo macchanger -A eth0Ĭurrent MAC: 00:0e:37:5b:d7:31 (Harms & Wende Gmbh & Co.kg) Set a random vendor MAC address of any kind. This change is not permanent as the MAC address on the interface eth0 will revert to the default on the next system reboot. Activate the modified Ethernet interface. Shut down the desired Ethernet interface. Permanent MAC: 84:8f:69:b0:fa:0a (unknown) Change the MAC address of an Ethernet interface temporarily. Set random vendor MAC address of the same kind. MAC Changer is a utility for viewing/manipulating the MAC address of network interfaces. Reboot or reconfigure network interfaces by hand. # This file describes the network interfaces available on your system To permanently change the MAC address of an Ethernet interface, you need to edit /etc/network/interfaces configuration file and use hwaddress directive. Change the MAC address of an Ethernet interface permanently

I will briefly explain how to do this using standard commands and one particularly useful tool MAC Changer.Ĭhange the MAC address of an Ethernet interface temporarilyĬheck MAC addresses. Change the MAC address of an Ethernet interface and make this change permanent.

Qnap mac address restrictions