The MaxGuests property specifies the maximum number of
guest users that will be accepted by the server. Once the
maximum number of connections has been established, the server will
reject any subsequent connections until the number of active guest
users drops below the specified value. A guest user is one that
authenticates with the username "anonymous" and their email address
as the password.
Changing the value of this property while a server is actively
listening for connections will modify the maximum number of guest
logins permitted, but it will not affect connections that have
already been established. You can also use the Throttle method
to change the maximum number of clients, the maximum number of clients
per IP address and the rate at which clients can connect to the
server.
The default value for this property is zero, disabling guest
logins. If your server is accessible to the public and you decide to
allow guest users, it is recommended that you set the Restricted
property to True, and you should not grant permission for guests to
upload files or execute registered programs using the SITE EXEC
command.