• http://clintm.esria.com/2006/11/20/configuring-windows-2003-firewall-and-iis-6-for-pasv-ftp-port-range/
• http://support.microsoft.com/?id=555022

Make sure that IIS is setup to allow the meta base to be edited whilst running and then run:

cd Inetpub\AdminScripts
adsutil.vbs set /MSFTPSVC/PassivePortRange “5500-5520”
iisreset

Then you need to open the ports in the firewall.  If using the inbuilt firewall you can add the manually like:

C:\Inetpub\AdminScripts>NETSH FIREWALL ADD PORTOPENING TCP 5500 PassFTP
Ok.

C:\Inetpub\AdminScripts>NETSH FIREWALL ADD PORTOPENING TCP 5501 PassFTP
Ok.

etc.