Setting up ftp server on pogoplug E02 (no replies)

Hi

I want to setup an FTP server on my pogoplug E02 (Debian, nothing else on that pogoplug), but I want it to be accessible from the outside, i.e. internet. The usage scenario is that certain websites can push files to the ftp server (my pogoplug) (instead of downloading the files) and I will move them from the pogoplug to my computer and do use them there.

This is in principal no problem (redirecting ports ion the router to the pogopug) but I want to have this safe so that the risk is minimized. I don't want to open all doors for hacking of my network. So my question is: are there any things I should consider? Configurations?

Any suggestions?

Thanks,

Rainer