68Locking out password crackersWhen you open your computer to incoming connections, it’s a good idea to include Lockout protectionso that anyone who supplies an incorrect password more than a particular number of times is deniedaccess to your computer. You enable Lockout and set the number of allowable tries as part of Securitysetup.Like combination safes, security passwords can be compro-mised. Password crackers use a variety of techniques;some techniques are more sophisticated than others, butalmost all require guessing.To guard against unauthorized access, use Lockout to baranyone who makes repeated attempts at guessing a pass-word for entry to your computer.Use Lockout to protectagainst someone whoattempts to guess yourpasswords.As set up here, Lockoutwill take effect after fivefailed attempts for eachlog-in name.Someone supplying thelog-in name NormaJeanhas been locked out andwon’t be able to connecteven if he or she suppliesthe correct password.