I am thinking about attaching an external HD to my Airpot (ac), which I will use to back up my computer using SuperDuper on a nightly basis. However, I am concerned about security. I know that I can set a password to access the disk. But is the disk available via the internet? I'm concerned that someone outside my network might be able to access the disk.


Disks connected to an Airport router aren't, by default, accessible from the Internet. This is for a few reasons:

  1. Your ISP is almost certainly running firewalls that would make it hard to do this anyway.
  2. By default, disks are only accessible from your local network.

That said, it's possible to make a disk accessible from the Internet if you want to - see this post on the Apple support forums. If you don't specifically take those steps, the disk won't be publicly accessible.

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