Hayim Sokolsky wrote:
>Actually "plain old" FTP on z/OS has supported encryption --- directly ---
>for a good long while.

A very long while. z/OS 1.2 (Generally Available on October 26, 2001) 
introduced support for TLS/SSL FTP (a.k.a. FTPS) along with related security 
enhancements. That was for both the FTP client and server. Of course there have 
been many FTPS-related improvements in z/OS releases since then.

IETF RFC 4217 (?Securing FTP with TLS,? published in 2005) is the most relevant 
document describing the FTPS standards.

Phil Smith III asks:
>....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!

Of course. z/OS AT-TLS supports both inbound and outbound connections. 
Including FTPS connections.

Here are the instructions for enabling the FTP server to use z/OS AT-TLS (z/OS 
3.1 link, subject to change):

https://www.ibm.com/docs/en/zos/3.1.0?topic=security-steps-customizing-ftp-server-tls

And here?s the link for the FTP client:

https://www.ibm.com/docs/en/zos/3.1.0?topic=security-steps-customizing-ftp-client-tls

?????
Timothy Sipples
Senior Architect
Digital Assets, Industry Solutions, and Cybersecurity
IBM Z/LinuxONE, Asia-Pacific
[email protected]


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