How to change a MAC address in FreeBSD

In FreeBSD, you can change your MAC address with the `ifconfig <interface> link <address>` command.

Ex:
ifconfig fxp0 link 00:21:27:c9:cd:30

To make the change permanent, at boot time:
echo "/sbin/ifconfig fxp0 ether 00:21:27:c9:cd:30" >> /etc/start_if.fxp0