Enable Leopard’s Off-By-Default Firewall

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Computer security firm publication Heise criticizes Mac OS X Leopard for shipping without its firewall enabled by default like Windows Vista and advises users to turn it on. To do so, in System Preferences’ Security area either block all incoming connections or set explicit exceptions for services that can communicate through the firewall, like file or screen sharing, as shown. (More on that in an upcoming post.)