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6. On the Select Rule Action page, ensure that the default Allow is selected. Click Next. 7. On the Bridging Mode page, shown in Figure 8-16, choose one of the following options:

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Secure Connection To Clients When you select this mode, ISA Server establishes a secure HTTPS connection with the client, but forwards the request as standard HTTP to the published Web server. Secure Connection To Web Server When you select this mode, ISA Server establishes a standard HTTP connection with the client, but forwards the request as secure HTTPS to the published Web server. Secure Connection To Client And Web Server When you select this mode, ISA Server establishes a secure HTTPS connection with the client, and also forwards the request as secure HTTPS to the published Web server.

Figure 8-16

8. The remaining steps in the wizard are almost identical to the steps for configuring a Web publishing rule. The only difference is that you need to choose or create a Web listener that listens for SSL requests. You can modify the SSL bridging configuration for the secure Web publishing rule after you create the Web publishing rule. If you decide that you no longer need SSL connections between the ISA Server computer and the client computers, change the Web listener to support HTTP rather than HTTPS connections. If you decide to change the SSL configuration for the ISA Server to Web server connection, access the Bridging tab on the Web Publishing Rule Properties dialog box, shown in Figure 8-17. On this tab, if you choose the option Redirect Requests To SSL Port, the connection between the ISA Server computer and the Web server will be secured. If the Web server is configured to require client certificates, you must also select Use a Certificate to Authenticate to the SSL Web Server, and select a certificate that ISA Server will use to authenticate to the Web server.

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8

Figure 8-17

Notice that the SSL settings are configured on each publishing rule. This means that you have a great deal of flexibility about how you will deploy SSL. You can have one Web publishing rule that requires SSL connections to both client and server, and have another rule that requires only SSL connections between the ISA Server and the client computers. If you have multiple Web listeners (which requires multiple IP addresses on the relevant network), you can even use different certificates to authenticate the ISA Server computer.

In this practice, you will configure a secure Web Publishing rule. This publishing rule will require SSL connections from the client computer to the ISA Server, but not SSL connections from the ISA Server to the Web server (DC1.cohovineyard.com). To begin, install an Enterprise CA on DC1.cohovineyard.com. Then use the Certification Authority to issue a certificate for the ISA Server computer. Once the certificate is in place, you will configure and test the secure Web publishing rule.

1. On DC1, log on as an Administrator. 2. Open Control Panel and open Add Or Remove Programs. 3. Click Add/Remove Windows Components. On the Components list, click Certificate Services. 4. In the Microsoft Certificate Services warning box, click Yes and then click Next. 5. On the CA Type page, click Enterprise Root CA and then click Next.

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6. On the CA Identifying Information Page, type Coho Vineyards CA as the common name for the CA and click Next. 7. On the Certificate Database Settings page, click Next. 8. Click OK to clear the warning message, and then wait for the installation to finish. You may need to provide the Windows Server 2004 installation CD to complete the installation. 9. When the installation completes, click Finish.