I have set up an OES2 box with iFolder. If I VPN in to my network, it works perfectly. I had set up a public address and a route via port 443 and 80 to this and set up a split zone DNS so the same name is used inside and outside the firewall but with the correct address for where you are living at that moment.

I also got a real certificate for this site and installed it into Apache so there are no certificate issues.

As I said, when I VPN in, I can reach the server fine and see my folders. When I do not, I can reach the server via a web browser, but cannot get the iFolder client to connect to it.

Are there any additional ports that need to be allowed through other than http and https? Is ICMP required?