Questions about iFolder

I will try to to the point on this. We have a couple of servers: 1 is a web server only and the other is a mail/eDir server only. Requests made on 80 and 443 go to the web server. We have installed ifolder on the mail/eDir server. We would like the web server to run the ifolder web app (so when someone types in http://domain.com/ifolder, you land on the web server) and have the web server get auth and store info from the mail/eDir server. During folder setup, you are asked some questions. 2 of which i wondered would accomplish what we like:
1)ifolder public url and private url
2)host or ip of the folder server that will be used by the folder web access app

What should these be in our case/environment as stated above?