iis - FTP directory restrictions via IIS6

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We are trying to setup the FTP on our
stand-alone dedicate Windows Server 2003 (Standard, 32bit, SP2) IIS6. We are NOT using
AD.

It is NOT setup for user isolation, as I
need the "administrator" account to be able to access any part of the D: drive (which
the FTP has setup as it's root).

I want to be
able to restrict a single user account (created on the local box) to only be able to
access a particular sub-sub-directory structure on the drive. I do not want to allow
this user to read/write/navigate to any other part of the D: drive. If necessary I can
accept directory listings, but certainly nothing more than
that.

In IIS6 I have created a virtual directory
using the username (as the user mentioned above) as the alias - logging into FTP using
the credentials puts them straight into the directory, which is correct and what I'm
after. But I cannot find any way of blocking them from navigating outside of "their"
structure.

I have tried Denying them
permission at the root of the D: drive, but of course the Deny overrides any attempt to
Allow them permission in "their" directory.

I
have also tried creating a group, so that should I need to I can add other users into
this group and they will also be denied access to anything that isn't their directory
structure.

As you might have gathered, I'm not a
Network Admin by trade, so please be gentle!

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class="normal">Answer

Thanks to
Bad Dos, he has sent me roughly in the right direction and I have figured out a way of
setting up the permissions that works for us. As he says, our current FTP setup is not
ideal, and we will look at changing it in the near
future.

In the mean time, I have done the
following
things:

• Created
  a group (called "AllFtpUsers") and allocated the new user (mentioned above) into
  it.


• Removed both the "Users" group and "Authenticated
  Users" group from the root of the D: drive


• Added the
  "AllFtpUsers" group to the root of the D: drive, with just "List Folder Contents"
  allowed.


• All directories in the root of the D: drive
  have had the "AllFtpUsers" group set with "List Folder Content" denied (meaning they can
  see but not alter files in the root directory, and not navigate into any of the
  sub-directories)


• Set the permissions on the
  "sub-sub-directory" (that IIS has the virtual directory set to) to "Modify"
  control

This means that
we still have full control with our normal login, but the new user can only change their
sub-sub-directory (despite also being able to see all files in the
root).

The reason for remove the
"Users" and "Authenticated Users" group from the root was that as soon as the new user
had logged in, they were given all the permissions of those groups - leaving us access
to the files/directories as normal through the "Administrators"
group.