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Practice: Implementing Network Templates
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In this practice, you will apply the Edge Firewall template. Then you will review the access and network rules created by the template. Finally, you will test the template settings to ensure that you have Internet access.
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Exercise 1: Applying the Edge Firewall Template
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1. In the ISA Server Management Console tree, expand ISA1, then expand Configuration, and then click Networks. 2. In the Task pane, on the Templates tab, click Edge Firewall. 3. In the Welcome to the Network Template Wizard, click Next. 4. On the Export the ISA Server Configuration page, click Export to export the network configuration before modifying it. 5. In the Export Configuration dialog box, type Network Configuration PreTemplate in the File Name box. Click the check boxes for Export user permission settings and Export confidential information (encryption will be used) and then click Export. 6. Type a password in the Password and Confirm Password boxes. Click OK. When the export finishes, click OK.
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Configuring ISA Server as a Firewall
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7. On the Export the ISA Server Configuration page, click Next. 8. On the Internal Network IP Address page, confirm that the start address is 10.10.0.0 and the end address is 10.10.0.255. Also ensure that the network broadcast address (10.255.255.255) is listed. Click Next. 9. On the Select a Firewall Policy page, click Allow limited Web access and access to ISP network services. Click Next. 10. On the Completing the Network Template Wizard page, review the configuration and click Finish. 11. Click Apply to apply the changes.
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Exercise 2: Reviewing the Access and Network Rules Created by the Edge Firewall Template
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1. In the ISA Server Management Console tree, click Firewall Policy.
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Note Notice that all the access rules you previously configured were overwritten by the template. Moreover, the perimeter network and network rule that you created in the previous practice were overwritten by the template.
2. In the Task pane, double-click Web Access Only and examine the properties of the access rule. Click OK. The Web Access Only access rule allows HTTP, HTTPS, and FTP traffic from the Internal and VPN Clients network to the External network. 3. In the Task pane, double-click Allow DNS To The Internet and examine the properties of the access rule. Click OK. The Allow DNS To The Internet access rule allows DNS traffic from the Internal and VPN Clients network to the External network. 4. In the Task pane, double-click VPN Clients To Internal Network and examine the properties of the access rule. Click OK. The VPN Clients To Internal Network access rule allows all protocols from the VPN Clients network to the Internal network. 5. Click Networks. In the details pane, click Network Rules. 6. Double-click the Internet Access Network Rule and examine the properties of the access rule. Click OK. The Internet Access Network Rule defines a NAT relationship between the Internal, Quarantined VPN Clients and VPN Clients networks, and the External network.
Lesson 3
Implementing Perimeter Networks and Network Templates
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Exercise 3: Testing Internet Access
1. Switch to the CLIENT1 virtual machine and log on to the cohovineyard.com domain. 2. Open Microsoft Internet Explorer and attempt to connect to www.microsoft.com. 3. Attempt to connect to www.msn.com. 4. Attempt to connect to ftp://ftp.microsoft.com. You may need to clear the Enable Folder View for FTP Sites on the Advanced tab in Internet Options to view the FTP directory listing. All connections should be successful.
Lesson Review
Use the following questions to help determine whether you have learned enough to move on to the next lesson. If you have difficulty answering these questions, review the material in this lesson before beginning the next lesson. You can find answers to these questions in the Questions and Answers section at the end of this chapter. 1. You are the network administrator of a small company. Your company does not publish any servers to the Internet and your ISP handles all Internet services for your organization. You need to enable Internet access for your internal users using only HTTP and HTTPS. What network template and policy would work best for you
2. You use a third-party firewall solution as your Internet-edge firewall. You have installed ISA Server 2004 and you are using it just to take advantage of the caching capabilities. What network template will you choose a. Front Firewall b. Bastion Host c. Edge Firewall d. Single Network Adapter
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