Question : Problem: how to configure airport extreme for remote access

How do I configure an Airport extreme for remote access

Answer : Problem: how to configure airport extreme for remote access

58 Chapter 3    AirPort Network Designs
To share a USB hard disk on you network:
1 Plug the hard disk into the USB port on the back of the base station.
2 Open AirPort Utility, located in the Utilities folder in the Applications folder on a Mac, or
in Start > All Programs > AirPort on a Windows computer.
3 Select your base station, and then choose Manual Setup from the Base Station menu,
or double-click the base station to open its configuration in a separate window. Enter
the base station password if necessary.
4 Click the Disks button, and then click File Sharing.
5 Choose With a disk password, or With base station password if you want to secure
the shared disk with a password, or choose With accounts if you want to secure the
disk using accounts.
 If you choose to use accounts, click Configure Accounts, click the Add (+) button, and
then enter a name and password for each user that will access the disk.
 
6 Choose Not allowed, Read only, or Read and write to assign guest access to the
disk.


THIS IS THE PART YOU NED:

7 Select the Share disks over Ethernet WAN port checkbox if you want to provide
remote access to the disk over the WAN port.
Data transfer speed may vary, depending on the network.


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combine this with a dyndns-service; and normally you should be able to access your disk on the external ip using the default port of AFP (548)