On Wed, 10 Apr 2024 17:59:26 +0000, Pommier, Rex  wrote:

>    ...
>Anyway, Microsoft ftp client doesn't support passive and zscaler only supports 
>passive.  Guess what quit talking?
>
The dual-socket FTP design, separating control and data, was recherché in
its time and now obsoleted by security practices.

Has any FTP implementation exploited the optimization offered by such as
    <https://man7.org/linux/man-pages/man2/sendfile.2.html>,
connecting the socket via kernel to a file descriptor?

-- 
gil

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