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Status Not under consideration
Workspace WebSphere traditional
Created by Guest
Created on Nov 20, 2015

RELATED IDEAS

Implement DHE ciphers in IBM HTTP Server to provide Forward Secrecy to clients that do not support ECDHE ciphers

We use IBM HTTP Server 8.5.5 as HTTPS gateway in front of WebSphere Application Server portal system to service a multitude of different, external clients via
internet. Those clients are outside our scope of influence, so we cannot dictate security policies, especially HTTPS cipher suites.
Due to several SSL/TLS vulnerabilities in the last year we need to harden our TLS encryption setup on our webserver.
Our goal is to provide a maximum of security while still being able to provide a high level of compatibility to older clients.
By our corporate security policy we need to implement Forward Secrecy, which in principle works fine in IHS by using ECDHE ciphers.
But a lot of our clients use Java6 and Java7, and these cannot use ECDHE ciphers. Thus Java6/7 can obtain Forward Secrecy only by using the standard DHE ciphers <=1024 bit.
And since the standard 1024-bit DH Oakley Group 1 and 2 cannot be considered secure anymore, we need to be able to define custom DH-Groups with 1024 bit keysize in IBM HTTPServer.

Idea priority High
RFE ID 80629
RFE URL
RFE Product IBM HTTP Server
  • Admin
    Graham Charters
    Jun 6, 2022

    Thank you for the suggestion. The requirement does have merit, but looking at it with respect to our total backlog of requests we do not see sufficient interest in this enhancement to merit delivery any time in the foreseeable future. Given the unlikelihood that we would deliver this, we are declining the request rather than leaving it in an uncommitted state for an extended period of time. If you would like to discuss this decision further, please contact Graham Charters <charters@uk.ibm.com>.

  • Guest
    Dec 1, 2015

    A quick interim update. I noticed this was an existing requirement on our GSKit security library and asked them to reconsider the priority. It is now something akin to stretch work for their current milestone, but if it does not make the cut the next opportunity would be mid-year 2016. Accepting IHS RFE as uncommitted candidate for now.

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