Access to Internet Services Manager (HTML) is restricted to Localhost
As a security precaution, Setup restricts Internet Services Manager (HTML) to allow access only from the server computer itself (Localhost, IP address 127.0.0.1).

Please try the following:

To enable remote use of Internet Services Manager (HTML) to administer this server, go to the server and use the IIS snap-in to update the IP address restrictions for the Web site IISADMIN.

Important    IP address restrictions can only be modified on the server if it is running IIS on the Windows 2000 Server or Windows 2000 Advanced Server platform. IP address restrictions cannot be modified by using IIS on the Windows 2000 Professional platform.

In the Internet Information Services snap-in,

  1. Expand the Web site you are connecting to.
  2. Select the IISADMIN virtual directory.
  3. In the Action menu, select Properties.
  4. Select the Directory Security tab.
  5. Edit the IP address and domain name restrictions.

HTTP 403 - Access to Internet Services Manager (HTML) is restricted to Localhost
Internet Information Services