nova/releasenotes/notes/bug-1842149-5ba20d57872e999...

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A new pair of ``ssl_ciphers`` and ``ssl_minimum_version`` configuration
options have been introduced for use by the ``nova-novncproxy``,
``nova-serialproxy``, and ``nova-spicehtml5proxy`` services. These new
options allow one to configure the allowed TLS ciphers and minimum protocol
version to enforce for incoming client connections to the proxy services.
This aims to address the issues reported in `bug 1842149`_, where it
describes that the proxy services can inherit insecure TLS ciphers
and protocol versions from the compiled-in defaults of the OpenSSL
library on the underlying system. The proxy services provided no way
to override such insecure defaults with current day generally accepted
secure TLS settings.
.. _bug 1842149: https://bugs.launchpad.net/nova/+bug/1842149