[This is preliminary documentation and subject to change]
You can use the IIS snap-in that shipped with IIS version 4.0 to remotely administer IIS 5.1 on an intranet. To remotely administer IIS over the Internet or through a proxy server, you should use a Web-based server management appliance. In addition, you can designate one Web site that can be administered programatically by applications that use the IIS 3.0 administration interfaces.
Note
In IIS 3.0, any virtual directory that did not
have a specific IP address associated with it was accessible from
all Web sites hosted on that computer. This behavior changed
in IIS 4.0, 5.0, and 5.1; to make a virtual directory
accessible from multiple Web sites that use multiple IP addresses,
you must now also add that same virtual directory to each of
those sites.
Important
The column entitled Verbs in the App
Mappings property sheet lists the HTTP verbs that will be run
by an application. In IIS 4.0, this column, entitled
Exclusions, listed the HTTP verbs that are not
run by an application. If you perform remote administration tasks
between computers running IIS 4.0 and IIS 5.0 or 5.1,
this column is incorrectly labeled.
For more information on application mappings, see Setting Application Mappings.