More on Mac security
But what how do you keep your business to yourself when you're using the Wi-Fi at your corner coffee shop? It has to be unprotected for you to use it, unless you have to ask for the password at the counter, along with the key to the bathroom. Even in that case, you're sharing a network with people you don't know. Having your software firewall turned on is the obvious first step; see last month's column for how to enable the OS X firewall.
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