Occasionally, when I’m on the client’s site, the Internet connection on my MacBook Pro completely dies even though I’m connected to the Wi-Fi network and have a valid (that is, not self-assigned) IP address. Usually this is caused when the VPN I’m connected to (yes, even though I’m on the client site I still sometimes need to connect to their VPN) crashes my machine, and I’m talking gray-screen-of-death calibre of crashing.