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Paint QR Code JIS X 0510 in C#.NET Lesson 5

Lesson 5
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Configuring Access Rules for Internet Access
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Case Scenario Exercises
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In this exercise, you will read two scenarios about installing ISA Server 2004, and then answer the questions that follow. If you have difficulty completing this work, review the material in this chapter before beginning the next chapter. You can find answers to these questions in the Questions and Answers section at the end of this chapter.
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Scenario 1
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Your organization s network includes a single Active Directory domain. Clients in your organization use Web browser applications from multiple vendors. You have implemented ISA Server 2004 as your proxy and firewall solution. Your organization s Internet usage policy states the following:
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All users will have Internet access from 12:00 noon to 1:00 P.M. and after regular business hours. Users should be able to use all protocols to access the Internet during these times. Managers and Executives and Domain Admins will have Internet access at all times. Two computers in the cafeteria area and two in the front lobby are set up for public access. These computers will only be able to use HTTP and HTTPS to access the Internet. MP3 file types will be blocked for all users at all times. Executable files will be blocked for all users except for the Domain Admins group.
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Scenario 1 Question
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1. How must you configure ISA Server 2004 to meet these requirements
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Scenario 2
Your organization has three branch offices, all of which are connected to the head office with dedicated high-speed links. Moreover, all ISA Server computers have a 128-Kbps ISDN connection available that is used as a backup connection to the head office. The head office has a high-speed Internet connection. All access to the Internet from all offices must use this head-office Internet connection. You have implemented ISA Server 2004 as your proxy and firewall solution in all offices. All users in
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5
Enabling Secure Internet Access with ISA Server 2004
the organization require Internet access, but they should be required to authenticate before getting access to the Internet. All users use a recent version of Internet Explorer as their Web browser. You want the branch offices to be able to take full advantage of ISA Server s caching ability. The ISDN connection will be implemented as a backup route.
Scenario 2 Question
1. How will you configure the ISA Server computers at all locations
Troubleshooting Lab
In this lab, you will troubleshoot an Internet access issue. This issue is related to Internet access requirements for users at Coho Vineyards. Domain administrators have reported that they cannot access any Internet resources when they are logged on to DC1. They need to be able to access resources on the Internet. However, the Internet usage policy states that the administrators should only be able to access resources on the Microsoft Web site. The DC1 computer cannot be configured as a Web Proxy client.
Exercise 1: Testing the Configuration
1. Log in to DC1 as an Administrator. 2. Open Internet Explorer and try to access www.microsoft.com. The connection will fail. Why How would you fix this problem
Exercise 2: Enabling Internet Access on DC1
1. On ISA1, open ISA Server Management. Click Firewall Policy, and then click Managers Access Policy. 2. On the Tasks tab, click Create New Access Rule. 3. In the task pane, on the Tasks tab, click Create New Access Rule. 4. On the Welcome To The New Access Rule Wizard, type DC Access Policy as the Access rule name, and then click Next. 5. On the Rule Action page, click Allow, and then click Next. 6. On the Protocols page, ensure that the rule applies to All outbound traffic. Click Next.
Lesson 5
Configuring Access Rules for Internet Access
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7. On the Access Rule Sources page, click Add. 8. In the Add Network Entities dialog box, expand Networks, expand Computers, click DC1, and then click Add. Click Close. Click Next. 9. On the Access Rule Destinations page, click Add. 10. In the Add Network Entities dialog box, expand Networks, expand Domain Name Sets, click Microsoft Domain, and then click Add. Click Close. Click Next. 11. On the User Sets page, click All Users, and then click Next. 12. On the Completing The New Access Rule Wizard page, review the settings and click Finish. 13. Click Apply to apply the changes. 14. On DC1, open Internet Explorer and try to access www.microsoft.com. The connection should fail. Why can you not connect to the Web site 15. On ISA1, in ISA Server Management, move the DC Access Policy so that it is listed before the All Employees Access Policy. 16. Click Apply to apply the changes. 17. On DC1, open Internet Explorer and try to access www.microsoft.com. The connection should fail. Why can you not connect to the Web site 18. On ISA1, in ISA Server Management, expand Configuration, then click Networks. On the Networks tab, double click Internal. 19. On the Web Proxy tab, click Authentication. Clear the check box for Require All Users To Authenticate. Click OK twice. 20. Click Apply to apply the changes. 21. On DC1, open Internet Explorer and try to access www.microsoft.com. The connection should succeed. Try to access msdn.microsoft.com. Again the connection should succeed. Try to access www.msn.com. In this case, the connection should fail because the Microsoft Domain domain name set only enables access to the microsoft.com domain.
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