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https://issues.apache.org/jira/browse/CASSANDRA-13325?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17233896#comment-17233896
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Jon Meredith commented on CASSANDRA-13325:
------------------------------------------

Thanks for the review, pushed up a commit picking up the SSLFactory 
simplification and added the missing {{@Test}}s.

> Bring back the accepted encryption protocols list as configurable option
> ------------------------------------------------------------------------
>
>                 Key: CASSANDRA-13325
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-13325
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Local/Config
>            Reporter: Nachiket Patil
>            Assignee: Jon Meredith
>            Priority: Low
>             Fix For: 4.0-beta
>
>         Attachments: trunk.diff
>
>          Time Spent: 40m
>  Remaining Estimate: 0h
>
> With CASSANDRA-10508, the hard coded list of accepted encryption protocols 
> was eliminated. For some use cases, it is necessary to restrict the 
> encryption protocols used for communication between client and server. 
> Default JVM way of negotiations allows the best encryption protocol that 
> client can use. 
> e.g. I have set Cassandra to use encryption. Ideally client and server 
> negotiate to use best protocol (TLSv1.2). But a malicious client might force 
> TLSv1.0 which is susceptible to POODLE attacks.
> At the moment only way to restrict the encryption protocol is using the 
> {{jdk.tls.client.protocols}} systems property. If I dont have enough access 
> to modify this property, I dont have any way of restricting the encryption 
> protocols.
> I am proposing bring back the accepted_protocols property but make it 
> configurable. If not specified, let the JVM take care of the TLS negotiations.



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