essential computer security phần 6

chứ không phải là danh sách đen bởi tất cả các địa chỉ mà bạn không muốn nhận được e-mail, bạn tạo một danh sách ngắn hơn của các địa chỉ bạn muốn e-mail từ. Outlook Junk E-mail tùy chọn cho phép bạn lựa chọn nghiêm ngặt để xác định thư rác và những gì để làm với nó. | Wireless Network Security Chapter 8 125 around you at various ranges from the next room to the house next door to the roadside in front of your home. Are You Owned Wardriving The practice of cruising around in search of available wireless networks is known as wardriving. The term derives from a similar activity to search for available modem connections by wardialing or automatically dialing phone numbers to identify which ones result in a dial-up modem connection. Armed with a wireless device and antenna wardrivers patrol city streets and neighborhoods and catalog the wireless networks they discover. Some sophisticated wardrivers also tie their wireless network discovery to a GPS to identify the exact coordinates of each wireless network. For years a group dedicated to demonstrating how insecure most wireless networks are and increasing awareness of wireless network security issues has organized something called the Worldwide WarDrive WWWD . After four years they have decided that the WWWD has done all it can to raise awareness and have moved on to other projects but their efforts helped to spotlight the issues with insecure wireless networks. For more information about wardriving and wireless network security in general you can check out the book WarDriving and Wireless Penetration Testing. Wireless equipment often boasts of ranges over 1 000 reality is that unless there are no obstructions the temperature is above 75 and less than 78 the moon is in retrograde and it s the third Tuesday of the month the range will be more like 100 feet. But if your wireless data can make it the 75 feet from your wireless router in the basement to where you are checking your e-mail while watching a baseball game as you sit on the couch in your living room it can also make it the 60 feet over to your neighbor s house or the 45 feet out to the curb in front of your home. Although standard off-the-shelf equipment doesn t generally have tremendous range the wardrivers a term .

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