To establish SSL/TLS communication between two systems the systems
negotiate to determine the most secure cipher and protocol that is
supported and allowed on both systems. If that negotiation fails, it is
usually because the SSL/TLS support on one of the systems is seriously
down level from the other and only supports ciphers or protocols that
are now disallowed by the newer system -- because the newer system now
considers some older techniques too insecure to be safely used. If
that's the problem, SSL/TLS support on the down-level system should be
upgraded, since the whole point of using SSL/TLS is to have secure
transmission in today's environment. To some extent allowed ciphers
can be controlled by configuration files, but you can't allow a
technique when the system lacks support for it.
Joel C Ewing
On 12/10/22 19:05, Charles Mills wrote:
https://www.ibm.com/docs/en/zos/2.4.0?topic=messages-ezd1285i
Charles
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf
Of Crusty Old Guy
Sent: Friday, December 9, 2022 8:47 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Interpreting SEND/RECV CIPHERs
0090 EZD1285I TTLS Data CONNID: 00000014 SEND CIPHER 1503020002020A
The 1503020002020A is an SSL alert packet with a fatal error: Unexpected message
This brief interchange comes from the archives. I need to find the meaning of
a different cipher.
I've gone through "IP Diagnosis" and didn't find any clues.
Can anyone help?
Thank you,
COG
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Joel C. Ewing
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