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Mainframe - Enabling AT-TLS (TLS v1) Configuration for Mac OS X

This article explains how to enable “Application Transparent-Transport Layer Security” (AT-TLS) security/encryption for tn3270 on Mac OS X.

  1. On the main screen click on the button marked Special.

  2. Set the value for "Port number" to 4992. Under "Security", check SSL, then select TLS 1.0 Preferred from the drop-down. Make sure "Negotiate SSL" is unchecked.

  3. Click OK, then click Open Connection to be taken to the mainframe login screen.

  4. Once launched, go to the File menu and select Save Default Settings to override previous defaults.

Keywords:mvs, tn3270, uchimvs1   Doc ID:47583
Owner:Todd L.Group:University of Chicago
Created:2015-02-25 11:44 CDTUpdated:2017-04-04 14:28 CDT
Sites:University of Chicago, University of Chicago - Sandbox
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