Basic Authentication for IIS
With IIS, start by denying
the anonymous user’s permission to read the subtree you want to
protect. On a standalone server named UDELL or in a domain of the same name,
that anonymous account by default is IUSR_UDELL.
Normally the anonymous user can read the entire web subtree, either
because you’ve granted read permission for that account or
because it belongs to a group that has read permission. To revoke
read permission, locate the
folder you want to protect (e.g.,
/web/Docbase/ProductAnalysis/docs
) in the
Windows Explorer, do right-click → Properties → Security
→ Permissions, and remove the anonymous user. While you’re
there, add the name of the account to which you do want to grant
access. Be sure to click Replace Permissions on
Subdirectories if you want to apply these changes to the
whole subtree.
You also need to tell IIS that it’s OK to use basic authentication when the anonymous user’s credentials fail—as will happen now that you’ve revoked that user’s permission to read the subtree. In IIS 4, you do this in the Microsoft Management Console (MMC). Find the virtual root corresponding to the directory you want to protect—or one of its parents, if you want basic authentication to be available more broadly on this server—and do right-click → Properties → Directory Security → Anonymous Access and Authentication Control → Edit. Check the Basic Authentication box. If need be, you can use its associated Edit button to specify an authenticating domain ...
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