At our office we have a router on the table, and the powers that be want to lock it down by MAC address to stop people from plugging in cables for other computers i.e. intruders.
Given that resetting the router to factory settings to bypass the password will wipe out all the configuration (it has to be manually entered static IP & DNS settings) it will prevent unauthorised use of the internet with it. Our live server can only be accessed from this IP which is the reason for the security.
Are there any inherent flaws in doing this from a security perspective?