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- Whether your computer is part of a network or is a stand-alone workstation, Windows NT provides a secure environment for your data.
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- With Windows NT - even if you use only a stand-alone machine - you need an account, and you must enter a username and a password.
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- Security is important as a protection from viruses as well as from theft of documents or programs.
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- A security problem on a network or a stand-alone machine can be extremely costly.
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- Your network administrator will implement much of the physical security of your network.
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- Network security as a whole depends on the cooperation of all the users.
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- So you need to know about the software security features that you can control, and how to use them.
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- The Logon Information dialog box is your first line of defense against someone who is trying to break into your system.
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- You can use this dialog box to help implement security, since you can change your password at any time.
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- Depending on how your account is set up, you may be forced to change your password after a certain number of logons.
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- <f>You should be careful not to choose a password that someone else could easily guess.
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- Remember that the password field is case-sensitive. This gives you useful extra flexibility when assigning passwords.
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- In addition, you can make a password easy to remember, but difficult to guess, by inserting a non-alphabet character between two unconnected words.
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- To change your password at any time, you simply press ^UCtrl+Alt+Del^u.
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- This brings up the Windows NT Security dialog box.
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- You click the ^UChange Password^u button to open the Change Password dialog box.
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- You type your current password at the Old Password field, and move the cursor to the New Password field.
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- You can move the cursor to the next field by pressing ^UTab^u, or by clicking the mouse button at that field.
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- Now you type your new password at the New Password field, and move the cursor to the Confirm New Password field.
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- Your network administrator may require you to assign a password of a specific or minimum length (up to a maximum of fourteen characters).
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- You type your new password again at the Confirm New Password field.
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- Finally, you click ^UOK^u to change your password.
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- Next time you log on you will have to enter your new password in the Logon Information dialog box.
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- As well as changing your own password regularly, you may wish to change the password of a user whom you occasionally allow to use your machine.
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- You then have the option of preventing such a user from changing the password you set for them.
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- This gives you added control over the security of the resources on your computer.
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- Suppose you wish to change the password of the user called GUEST.
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- GUEST is a built-in account designed to give limited access to an occasional user.
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- You would also like to retain complete control over the guest user's password.
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- You begin by clicking the ^UStart^u button, and pointing to ^UPrograms -^u ^UAdministrative Tools^u.
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- A list of all the users who can log on to your computer is displayed in the User Manager window.
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- To change GUEST's password, you double-click anywhere in the row showing the Username, Full Name, and Description of GUEST.
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- Alternatively, you can click once in the GUEST row, and then choose ^UProperties^u from the ^UUser^u menu.
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- The User Properties dialog box for GUEST is now open, with the cursor at the beginning of the Full Name field.
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- You highlight the row of asterisks at the Password field.
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- Now you type the new password that you wish to set for GUEST.
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- You highlight the asterisks at the Confirm Password field.
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- Then you re-type the new password at the Confirm Password field.
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- To prevent the guest user from being able to change the password you have set, you click the ^UUser^u ^UCannot Change Password^u checkbox.
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- You then click ^UOK^u (or press ^UEnter^u) to return to the User Manager window and save the new User Properties settings.
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- User Manager also provides another way for you to modify your own password settings.
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- But where you only want to change your own password, it's easiest to press ^UCtrl+Alt+Delete^u.
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- To close the User Manager you click the ^UClose^u button in the top right corner.
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- There may be times when it is inconvenient for you to log off, but you need to leave your workstation unattended.
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- Logging off from your workstation is not the only way of keeping intruders out of the system.
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- Instead you can ^Rlock^r your workstation to ensure that no one will be able to use it while you're gone.
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- The easiest way to lock your workstation is to press ^UCtrl+Alt+Del^u at any stage.
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- Then you click the ^ULock^u ^UWorkstation^u button, preventing anyone else from using your computer while you're gone.
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- The Workstation Locked box is then displayed on the screen.
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- Another way that you can lock your workstation is via your screen saver.
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- To do this you right-click a vacant area of your desktop, and select ^UProperties^u from the displayed menu.
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- The ^UScreen Saver^u tab in the Display Properties dialog box allows you to lock your workstation.
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- You click the ^UPassword^u ^Uprotected^u checkbox.
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- Remember that your screen saver is only activated (and your lock in place) after the time you specify in the Wait box.
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- Then you click ^UOK^u (or press ^UEnter^u).
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- Your screen saver appears after the specified number of minutes of keyboard and mouse inactivity - as usual.
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- However when you touch the keyboard or mouse again, the Workstation Locked box is displayed.
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- You can unlock the workstation easily by pressing ^UCtrl+Alt+Del^u as prompted.
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- You then type your password at the Password field of the Unlock Workstation dialog box.
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- When you click ^UOK^u (or press ^UEnter^u) your workstation will be as you left it, with any applications you had open still running.
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- Peer-to-peer security is another important aspect of security.
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- You may belong to a workgroup or domain in which other people have remote access to your computer.
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- Or there could be other users who have direct access to your computer.
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- You may be sharing many of your files with these other users.
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- With Windows NT, you can determine exactly what level of access each user has to each of your folders or files.
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- To do this you right-click any folder or file in NT Explorer, and click the ^UProperties^u menu option.
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- This opens the Properties dialog box.
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- You can set or view various aspects of folder or file security by clicking the ^USecurity^u tab.
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- You click the ^UPermissions^u button to see the Directory Permissions dialog box.
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- The File Permissions dialog box looks very similar to this.
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- It offers a subset of the permissions that you see in the Directory Permissions dialog box.
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- The first checkbox tells Windows NT whether you wish to apply any changes in folder security to sub-folders as well.
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- The second checkbox is for controlling whether new permissions will apply to files that already exist in the folder.
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- The Name listbox can contain groups or individual usernames, but groups are advisable because they are easier to manage.
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- Next to every name in the list is a permission level.
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- You can control this level with the Type of Access drop-down listbox.
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- To delete a group or a user, you highlight the relevant entry and click the ^URemove^u button.
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- The ^UAdd^u button allows you to add a group or user to the list.
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- The ^UAuditing^u and ^UOwnership^u buttons would normally be used by your network administrator.
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- To close the Properties dialog box, you click the ^UClose^u button at top right.
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