I saw Hayim's note that FTP on z/OS supports encryption, and uses 
AT-TLS/PAGENT, so I'm not asking about FTP itself here.

Rather, I'm wondering about the earlier suggestion to add AT-TLS. In the cases 
I've seen, AT-TLS only works for outbound. Can you also tell it "This incoming 
connection will be encrypted, please take the data out of the tunnel and 
present it to the application unencrypted"?

I expect y'all are gonna say "Of course", in which case today will be a good 
day -- I will have learned something!


And if it is "Of course", the reason I've not seen it is surely because the 
only times I've encountered AT-TLS is when people added it *on top* of the TLS 
our product already uses via GSK. As I've written before, this is a Very Bad 
Idea, because the outbound connection from z/OS, encrypted via AT-TLS, 
completes the handshake with the external server--which then gets the "inside" 
encrypted payload (the one WE encrypted via GSK), says "What the **** is 
THAT?!" and hangs up.

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