How to guide for getting a classic asp application working under IIS 7.0

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We’ve been moving some Classic ASP code to 64 bit Windows 2008. Here are some things we did or discovered along the way:

  • Start off by hosting the application
    in a ‘Classic’ pipeline mode
    application pool. Once things are running just fine you can switch to ‘Integrated Mode’ should you need to leverage the features it offers at a later date.

  • If your ASP application consumes any
    32 bit third party or in-house
    components you will need to configure the
    application pool to run in 32 bit
    mode. 32 bit DLL’s won’t load into a 64 bit process. You can configure this in the
    Advanced Settings of an application pool. Set Enable 32-Bit Applications to True.

  • To force detailed error reporting by
    Classic ASP, open the ASP ‘feature’ page for the website then expand the
    Debugging Properties node. Set Send Errors To Browser to True.

  • If your application uses parent paths
    you’ll need to configure this in the ASP
    settings ‘feature’ page (same one as
    above). The setting is under the
    Behaviour node and is named
    Enable Parent Paths. The default setting is
    False just as with IIS6.

  • The default anonymous account in IIS7
    is called IUSR. You can change this
    by opening the Authentication
    settings ‘feature’ page for the website and editing
    the Anonymous Authentication
    setting.

  • Prefer to use Application Pool Identities for both the Application Pool and site Anonymous account: Application Pool Identities

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