Best practice for large file transfer – SFTP or asymmetric file encryption

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Which is generally considered "best practice" when wanting to securely transmit flat files over the wire? Asymmetric encryption seems to be a pain in that you have to manage keysets at endpoints and make sure that the same algorithm is used by all clients, where as SFTP seems to be a pain because of NAT issues with encrypting the control channel, thus the router cannot translate IP. Is there a third-party solution that is highly recommended?

Best Solution

I believe you're talking about FTP with SSL when you say SFTP, and not the SFTP protocol that goes along with SSH. Use SFTP (the SSH version) as it doesn't require an encrypted control channel and will work fine over NAT. The SFTP page I linked to lists a number of graphical SFTP clients at the bottom of the page.