Suspect you are missing this from your FTP(S) server's FTP.DATA file

TLSMECHANISM ATTLS

It is easy to force security for the z/OS FTPS server as you are in control and 
can code the likes of :
SECURE_FTP REQUIRED
TLSMECHANISM ATTLS
SECURE_CTRLCONN PRIVATE
SECURE_DATACONN PRIVATE

The big question is what do you do about the anarchy that is batch jobs 
invoking the z/OS FTP client with whatever they like in their FTP.DATA file.

Mike Wawiorko


-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf 
Of SUBSCRIBE IBM-MAIN Mary Vollmer
Sent: 28 August 2017 17:50
To: [email protected]
Subject: How to require all secure FTP except to one subnet?


This mail originated from outside our organisation - [email protected]

I am implementing TLS 1.2 via AT-TLS and have a requirement to secure all FTPs 
using this protocol except for the exchanges occurring via the hipersocket.

I am manually coding the policy since I don't have zOSMF configured.  In my 
policy I have a rule for my unsecure connections, coding both LocalAddr and 
RemoteAddr with that of our hipersocket subnet.  It has a priority of 100 and 
is first in the policy.  I also have a rule for secure connections with no 
LocalAddr or RemoteAddr with a priority of 10.

In my FTPDATA:
   When I specify SECURE_FTP REQUIRED, all unsecure attempts (inbound and 
outbound) fail - including those via the hipersocket.


   When I specify SECURE_FTP ALLOWED, all unsecure attempts (inbound and 
outbound) are successful - even those NOT using the hipersocket.  

I turned on tracing and see the rules selected are as I would have expected but 
it appears the SECURE_FTP parm in FTP data rules, regardless of what's in the 
policy.  

Does anyone know if it's possible to do what I am trying do to with one TCPIP 
stack?

Thanks,
Mary Vollmer 
 

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