( link )
Talvez este tópico ajude?
If your Time Capsule (TC) is configured to be your Internet router, then you only need to do two things to allow access to it from the Internet:
o Using AirPort Utility, enable both the "Enable file sharing" and the "Share disks over Ethernet WAN port" options on the utility's Disks > File Sharing page. o On the utility's Summary page, note the value of IP Address. This will be the TC's WAN-side IP address.
To access the TC from the Internet, use Finder's Connect to Server option and enter afp://TC's WAN-side IP address in the Server Address box, and then, click on Connect.
Eu não tenho ideia do que seria a versão windows / linux do afp.