When their RF kill switch is on, some wireless devices (ipw2200 for example) don't report their real MAC address, but a zero one instead (00:00:00:00:00:00). These MAC adresses are written in /etc/iftab by drakconnect when a new network interface is configured.

When new network interfaces are created by the kernel, the net agent from hotplug lauchs ifrename to rename the new device according to iftab. However, it has an odd behavior when this file containes a zero MAC address, and the result seems quite random, depending on which network device was created first.

To prevent this situation, drakconnect shouldn't write zero MAC addresses, but ignore them instead.

It may even warn the user that the interface has a zero MAC address, and suggest him to turn the RF kill switch if it is a wireless interface.