TLS 1.0 to 1.2 upgrade on AIX-Urgent

As TLS 1.0 is going out of support by 13th Feb'18. Our FTP server (AIX 5.3) is with TLS 1.0 and communicating with Appian cloud. How to upgrade from TLS 1.0 to TLS 1.2 ? It is bit urgent and file transfer will stop otherwise.

 

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