Strategy for FTP transfers

Hello,

we are currently converting our SNADS file transfers to FTP, or at least new
transfer
requests are done via FTP. 

How do you handle these FTP transfers? Once setup, SNADS was really simple
to
use - but we're getting more and more non-AS400 systems to communicate with.

All of these FTP transfers are happening on our WAN - no outside connections

(internet) are planned. 

So, my main questions are:

  - how do you handle security (special FTP libs, users etc.) ?
  - checking of successful transfers (logging)
  - unexpected downtime of remote systems
  - who initiates the transfer..
  - any tools that provide SNADS like features?

Thanks for your input,

Oliver

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