When you override DNS entries here, using your Mac's Network preference pane, it only affects your Mac and not any other device on your network.
Entries in dark text indicate the DNS addresses were entered locally on your Mac.
These same instructions can be used for any network connection type, including Air Port wireless connections.
The DNS Servers list may be empty, it may have one or more entries that are grayed out, or it may have entries in normal dark text.
You configure your Mac's DNS settings using the Network preference pane.
In this example, we will configure the DNS settings for a Mac that connects via an Ethernet wired network.
Unplugging the ethernet cable shows the connection status changing in the list of connected devices in the router.
You can override the assignments by editing the DNS server list on your Mac.
In this case, the problem can be solved with a simple “ipconfig /release” command, followed by “ipconfig /renew”.
Imagine that your biggest client calls because they are having trouble retrieving their email. You can hardly reply, “No problem, I’ll get back to you in 24 to 48 hours.” And yet DNS gets away with it!
The update is believed to have been part of cumulative update KB 3201845, which was released on December 9.
After it was released, multiple European users reported being kicked offline.