qr code generator in c# windows application Using the Event Viewer in C#

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Using the Event Viewer
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The Event Viewer is an MMC snap-in that enables you to view three different logs that are stored by Windows XP Professional:
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System log.
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The System log contains events logged by the Windows XP Professional system components, such as drivers or other system components that failed to load during startup. Windows XP Professional predetermines the event types logged by the system components.
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The Application log contains events logged by applications or programs. For example, a database program might record a file error in the application log. The program developer decides which events to record. Many Windows XP Professional services (such as DHCP, DNS, and File Replication Services) use the application log.
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Application log.
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The Security log, if configured to do so, records security events, such as valid and invalid logon attempts. Events that are related to resource use such as creating, opening, or deleting files can also be logged. An administrator can specify the events that are recorded in the security log policy.
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Security log.
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When you select the log type in the left pane of the Event Viewer, the corresponding log data displays in the right pane. The data in the right pane can be filtered and resorted. In addition, you can select which columns of data to display by selecting Choose Columns from the View menu. The Event Viewer tracks five types of events:
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Error.
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A significant problem, such as loss of data or loss of functionality.
Warning.
An event that is not necessarily significant but might indicate a possible future problem.
Part III:
Security
Information. An event that describes the successful operation of an application, driver,
or service.
Success Audit. An audited security event in which a user s attempt to access a resource
succeeds.
Failed Audit.
An audited security event in which a user s attempt to access a resource
fails. In addition, the Event Viewer records the following:
The date of the event. The time at which the event occurred. The source (such as a service or process) that reported the event to the Event Viewer. The category of the event. In many cases, the category relates to the subsystem that reported the event. The user account associated with the event. The computer on which the event occurred. The Event ID, which is a numeric code that can be used to obtain additional information regarding the event being logged. A description of the event.
Using the Security Configuration and Analysis Snap-In
You can use the Security Configuration and Analysis snap-in at any time to analyze current system settings against a baseline template. Performing this analysis allows you to do the following:
Identify security holes that might exist in the current configuration. Identify the changes that a potential security policy will transmit to a system before actually deploying the security policy. Identify deviations from a policy that is currently imposed on a system.
For example, if you have created a custom security template, the Security Configuration and Analysis tools will allow you to compare your system s current settings against the settings that are defined by the security template that you created. If the custom security template defines a more secure configuration than the current settings provide, the analysis will identify the security holes that exist in the current system configuration, as well as the changes that will take place if the custom template is used to configure the system.
17:
Managing Authorization and Access Control
To load the Security Configuration and Analysis MMC snap-in 1. In the Run dialog box, type: mmc /s 2. On the File menu, click Add\Remove Snap-in, and then click Add. 3. In Available Standalone Snap-ins, select Security Configuration and Analysis. 4. Click Add, click Close, and then click OK.
Creating and Analyzing a Security Configuration Database
All configurations and analyses are database driven. The security configuration and analysis database, which is also referred to as the local computer policy database, is a computer-specific data store that is generated when one or more configurations are imported to a particular computer. A security configuration and analysis database is the starting point for all configurations and analyses done on a system. An initial database is created during a clean installation of Windows XP Professional. Initially, it contains the default security configurations that are provided with the system. You can export and save this database to a security configuration file immediately after the installation for use in the event that you want to restore the initial security configuration at some point. This database defines the security policy that is in force for that system. The system runs with the configuration defined in security policy. However, security policy might not define the entire configuration. For example, security might not be defined for every file or folder path. This means that security configuration attributes that are not enforced by policy can take any value for file and folder security either a default value or a value defined by another mechanism. Attributes that are not enforced by policy might also be configured manually using personal databases. However, any custom configurations that conflict with the policy are overridden by the definitions in the policy. Personal database configurations are useful in areas such as the registry and the file system, where multiple users on the system can secure their own registry portions and home directory subtrees. You can use the Security Configuration and Analysis snap-in to compare the current system configuration against the stored configuration in the database. Performing this analysis provides you with information about where a particular system deviates from the stored configuration. This information is useful for troubleshooting problems, tuning the security policy, and, most importantly, detecting any security flaws that might open up in the system over time. The database is initially created from the computer-independent configuration file described previously. New configurations can be added to the database incrementally without overwriting the entire configuration.
Part III:
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