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Microsoft® Windows Server™ 2003 White Paper
Figure 52. Application protection with IIS 5.0 isolation mode
By comparison, in worker process isolation mode, all requests for ASP.NET and ASP Web
applications are handled by an instance of W3WP.exe. You can create more application pools
and isolate virtual directories to run under a specific application pool.
Note By default, when an instance of the W3WP.exe process starts, it runs under the identity of
NetworkService, not LocalSystem or IWAM_MachineName.
Changing Application Isolation
Worker process isolation mode is the preferred mode and also the default mode for clean
installations of Windows Server 2003. However, for upgrades of Windows NT Server 4.0, you
must reconfigure the application isolation mode manually.
To change from isolation mode to worker process isolation mode:
1. Right-click
2. Click
Web Sites and click Properties.
the Service tab as shown:
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