Heise Security’s security expert Jurgen Schmidt has conducted tests and concluded that installing Leopard may lead to the firewall on a Mac being turned off and its default setting changed to leave it disabled. In other words, the updated software by default allows any and every incoming net connection. Mr Schmidt also found that installing the software as an upgrade to a machine on which the firewall was turned on would lead to this protective software being turned off when that computer was restarted. He noted that even when the firewall was re-activated it did not let users know about all the potentially vulnerable processes running on that machine.
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