barcode vb.net source code Controlling Printer Security in Visual C#

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Controlling Printer Security
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Windows Server 2003 allows you to control printer usage and administration by assigning permissions through the Security tab of the printer s Properties dialog box. You can assign permissions to control who can use a printer and who can administer the printer or documents processed by the printer. A typical printer Security tab of a printer s Properties dialog box is shown in Figure 8-5.
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Advanced Printer Configuration and Management
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The Security tab of a printer s Properties dialog box
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You can use a printer s access control list (ACL) to restrict usage of a printer and to delegate administration of a printer to users who are not otherwise administrators. Windows Server 2003 provides three levels of printer permissions: Print, Manage Printers, and Manage Documents. By default, the Print permission is assigned to the Everyone group. Choosing this permission allows all users to send documents to the printer. To restrict printer usage, remove this permission and assign Allow Print permission to other groups or individual users. Alternatively, you can deny Print permission to groups or users. As with file system ACLs, denied permissions override allowed permissions. Also, like file system ACLs, it is best practice to restrict access by assigning allow permissions to a more restricted group of users rather than by granting permissions to a broader group and then having to manage access by assigning additional deny permissions. The Manage Documents permission provides the ability to cancel, pause, resume, or restart a print job. The Creator Owner group is allowed Manage Documents permission. Because a permission assigned to Creator Owner is inherited by the user who creates an object, this permission enables a user to cancel, pause, resume, or restart a print job that he or she has created. The Administrators, Print Operators, and Server Operators groups are also allowed the Manage Documents permission, which means they can cancel, pause, resume, or restart any document in the print queue. Those three groups are also assigned the Allow Manage Printers permission, which enables them to modify printer settings and configuration, including the ACL itself.
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8
Printers
If a printer s security is not a major concern, you can delegate administration of the printer by assigning a group, such as the <Printer> Users group, Manage Documents or even Manage Printers permission.
Assigning Forms to Paper Trays
If a print device has multiple trays that regularly hold different paper sizes, you can assign a form to a specific tray. A form defines a paper size. When users print a document of a particular paper size, Windows Server 2003 automatically routes the print job to the paper tray that holds the correct form. Examples of forms include Legal, Letter, A4, Envelope, and Executive. To assign a form to a paper tray, select the Device Settings tab of the printer s Properties dialog box, as shown in Figure 8-6. The number of trays shown in the Form To Tray Assignment section obviously depends on the type of printer you have installed and the number of trays it supports. Further down the Device Settings tree are settings to indicate the installation state of printer options such as additional paper trays, paper handling units, fonts, and printer memory.
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Figure 8-6 The Device Settings tab of a printer s Properties dialog box
Print Job Defaults
The General tab of the printer s Properties dialog box includes a Printing Preferences button, and the Advanced tab includes a Printing Defaults button. Both of these buttons display a dialog box that lets you control the manner in which jobs are printed by the logical printer, including page orientation (portrait or landscape), double-sided
Lesson 2
Advanced Printer Configuration and Management
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printing (if supported), paper source, resolution, and other document settings. These dialog boxes are identical to each other and are also identical to the dialog box a user receives when clicking Properties in a Print dialog box. Why are there three print job Properties dialog boxes The Printing Defaults dialog box configures default settings for all users of the logical printer. If the printer is shared, its printing defaults become the default properties for all printers connected from clients to the shared printer. The Printing Preferences dialog box configures the user-specific, personal preferences for a printer. Any settings in the Printing Preferences dialog box override printing defaults. The Properties dialog box that can be accessed by clicking Properties in a Print dialog box configures the properties for the specific job that is printed. Those properties will override both printing defaults and printing preferences. This triad of print job properties sets allows administrators to configure a printer centrally by setting printing defaults on the shared logical printer and allows flexibility and decentralized configuration by users or on a document-by-document basis.
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