Specific user

Type the specific account name that you want IIS to use to access your site or application. By default, IIS 7 uses IUSR as the user name for anonymous access. This user name is created when you install IIS 7.

Set

Opens the Set Credentials dialog box, where you can specify an account name and password for IIS to use for Anonymous authentication.

Application pool identity

Select Application pool identity to enable IIS processes to run using the account that is currently specified on the property page for the application pool. By default, this is the Network Service account.

	Important
	If you use the Network Service account, you grant anonymous users all the internal network access associated with that account.