Learn How to change your MAC address of dm500hd- enigma2

To do so you need to add a special script file to 
/etc/network/if-pre-up.d/

Do not forget to make this file executable
chmod a+x init

the script name is init

and the contain is 

#!/bin/sh
ifconfig eth0 down
ifconfig eth0 hw ether 00:09:34:3B:4A:xx # you can put here your MAC address
ifconfig eth0 up