c# wpf qr code generator Lesson 2 in Visual C#

Creator QR-Code in Visual C# Lesson 2

Lesson 2
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Designing Client Configuration for the Security Update Infrastructure
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Design GPOs for special issues:
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Consider that a typical patching schedule operates on a daily basis. Do you need to apply critical patches sooner Create a temporary GPO for rapid patch installation. The temporary GPO can change the Configure Automatic Updates policy to an earlier time and also can automatically download and install the patch. The GPO can be linked to the domain or organizational unit when critical patches need to be distributed fast, and then unlinked to allow the normal GPO patch application to be used. Once the computers affected by the GPO refresh their policies, the new, approved, critical patch will download and be installed. Prepare for failure. Sooner or later a SUS server will fail. If more than one SUS server exists, use a temporary site GPO to point clients to an alternative SUS server. The temporary GPO must have a higher priority than the GPO that normally points clients to the local SUS server. When the local SUS server is operational again, remove the temporary GPO and clients will begin using the local SUS server after the next policy refresh. This policy can be used, for example, to point clients of a child SUS server to the parent SUS server should the child SUS server fail.
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Practice: Designing GPOs
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In this practice, you will design GPOs for a fictitious organization and explain why you made the decisions that you made. Read the scenario and then answer the question that follows. If you are unable to answer the question, review the lesson materials and try the question again. You can find an answer to the question in the Questions and Answers section at the end of the chapter.
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Scenario
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You are a security designer at Coho Winery. The winery has three locations: Boston, New York, and Paris. Boston and New York each have a single SUS server. Paris has three SUS servers: a parent SUS server, a child SUS server used in the testing environ ment, and a child SUS server used in the production network. Many users in New York and Boston work from home or are traveling a significant amount of the time. Users in Paris all work from a central location. Only a few users travel. You have been tasked with designing Group Policy objects for each location. You need to specify only the settings that are dictated by the information provided.
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5
Designing a Security Update Infrastructure
Review Questions
Answer the following questions. 1. What Group Policy objects will you design Why
Lesson 3
Monitoring and Improving the Security Patch Update Process
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Lesson 3: Monitoring and Improving the Security Patch Update Process
You design a security update process to ensure that systems are patched. But all the work spent designing and implementing the process is worthless if the patches applied cause problems for the systems they are applied to, are not actually being applied on all systems, or are not applied before an attack attempts to take advantage of the vul nerability the patch is meant to mitigate. The final important step in creating your secu rity update infrastructure design is to specify how to resolve the testing, monitoring, and efficiency problems.
After this lesson, you will be able to
Explain the goals of security patching programs. Audit the security patching process. Explain what MBSA can help you do. Use MBSA to scan computers for missing patches. Describe the requirements for MBSA scanning. Audit patching status using MBSA. Explain the considerations for using MBSA to audit patch applications. Determine patch status by using SUS and client logs. Test security patches. Monitor and improve the patch management process.
Estimated lesson time: 30 minutes
The Goals of Security Patching Programs
The goal of a security patching program is not just to patch systems. The goals of secu
rity patching programs are to:
Determine which security patches should be applied
Determine whether the patch installation process is working
Not break computer systems by applying security patches
Apply security patches before the weakness that they correct is attacked
The first two goals can be met by auditing the security patch status of computer sys
tems. The third goal can be met by testing patches on test computers before deploying
them to production computers. Finally, it will not always be possible to apply security
patches to all systems before they are attacked. However, it is possible to make the
security patching process more efficient. The following sections teach the information
and guidelines that you will need to meet these goals.
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5
Designing a Security Update Infrastructure
How to Audit the Security Patching Process
Use the following steps to design the patch auditing process: 1. Use MBSA to determine which security patches need to be installed on which computers. 2. After your security patching procedures have completed, determine which secu rity patches have been installed. 3. Use this information to refine the security patching process. To determine which patches are needed, use Microsoft Baseline Security Analyzer (MBSA). This utility scans an entire network of computers and produces reports that list missing patches. To determine whether the patch installation process is working, do the following: 1. Use MBSA to scan against a list of approved patches to determine which ones have not been installed. 2. Enumerate patches installed on a specific computer by using a WMI script or other method. Information on a sample script is included in the sidebar A Patch Man agement Equation. 3. Use other tools, data, and methods to determine why patches are not being installed and to validate the entire update process:
Use SUS and client logs to troubleshoot patch installation and patch downloads. Use MBSA notes and Knowledge Base articles to investigate specific patch issues. Use the Resource Kit tool Gpresult, the Resultant Set of Policy tool, and the Group Policy Management Console tool to determine whether problems with Group Policy are interfering with the update process. Use normal network troubleshooting efforts to determine whether network issues are part of the problem.
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