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Status Delivered
Workspace z/OS
Categories Communications Server
Created by Guest
Created on Oct 3, 2014

RELATED IDEAS

CSSMTP TLS enhancement

It's possible to enable the SMTP server and client to use Transport Layer Security (TLS) to provide private, authenticated communication over the Internet. As per SMTP protocol definition a client server connection will be closed as soon as the client sends a quit command. That means that for every single mail stored in a separate sysout dataset a new TLS connection has to be established. The total overhead to establish a new TLS session comes to about 6k bytes on average and also the CPU consumption is not negligible. The smaller and the more mails are delivered the greater is the overhead.

Idea priority High
  • Guest
    Reply
    |     Jun 26, 2017

    This was provided in V2R2 and in V2R1 in APAR/PTR PI38893/UI26955

  • Guest
    Reply
    |     Nov 19, 2015

    Due to processing by IBM, this request was reassigned to have the following updated attributes:
    Brand - Servers and Systems Software
    Product family - z Systems Software
    Product - z/OS Communications Server

    For recording keeping, the previous attributes were:
    Brand - WebSphere
    Product family - Enterprise Networking
    Product - z/OS Communications Server

  • Guest
    Reply
    |     Oct 16, 2014

    Are you are using TLS session caching? This is a function that's supported on z/OS that remembers the TLS information for a session and therefore reduces the negotiation for new connections to the same servers. This function is enabled by default on z/OS, but I wanted to see if you were using it in this scenario (i.e., you haven't turned it off and the mail server on the other end also supports/uses it).

    We are still considering the rest of the requirement but this might help reduce the load in the meantime.

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