I had an ISP that would whitelist the MAC address that was allowed to connect to it. When I first signed up, I didn't realize this and they used an old server I

I had an ISP that would whitelist the MAC address that was allowed to connect to it. When I first signed up, I didn't realize this and they used an old server I had sitting around. Because their technical support was so awful, it was easier to spoof the MAC of the old server than it was to get through to someone who could actually whitelist my new machine's MAC.