Technical Requirements

There shouldn't be any requirements that any web hoster wouldn't comply with, but here they are:

1. PHP 5.3+
2. PHP PEAR (to install on Debian/Ubuntu, run apt-get install php-pear)
3. The php-curl module
4. Read/write permissions on your webspace
5. Reasonable amount of protection, i.e. only authorised users (you) can upload/download the files
6. Ideally with it's own IP address (makes configuring the VPN easier)