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https://issues.apache.org/jira/browse/TS-3136?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14586515#comment-14586515
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Susan Hinrichs commented on TS-3136:
------------------------------------
We've had one person review the list internally, and it is queued up with
another. The first reviewer thought the list was ok. But acknowledged it may
not be practical to remove RC4. He also noted that there are problems with CBC
algorithms as well (e.g. BEAST) so it isn't necessarily clear that RC4 is so
much worse.
I'm in the process of trying out the string in production to see what kind of
performance impact it has (does it increase CPU utilization or handshake
failure rate?). Unfortunately due to session sharing in our production farms,
I need to get more clearance to try the new cipher_suite string on all machines
in the group rather than just one.
> Change default TLS cipher suites
> --------------------------------
>
> Key: TS-3136
> URL: https://issues.apache.org/jira/browse/TS-3136
> Project: Traffic Server
> Issue Type: Improvement
> Components: Security, SSL
> Reporter: Leif Hedstrom
> Assignee: Susan Hinrichs
> Labels: compatibility
> Fix For: 6.0.0
>
>
> In TS-3135 [~i.galic] suggested:
> {quote}
> also, recommendations for a safer ciphersuite:
> SSLCipherSuite
> ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-SHA:ECDHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES128-SHA256:DHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES256-GCM-SHA384:AES128-GCM-SHA256:AES256-SHA256:AES128-SHA256:AES256-SHA:AES128-SHA:DES-CBC3-SHA:HIGH:!aNULL:!eNULL:!EXPORT:!DES:!MD5:!PSK:!RC4
>
> from https://cipherli.st/
> {quote}
> [~jacksontj] had responded with:
> {quote}
> [~i.galic] That cipher quite is geared towards security, but doesn't support
> quite a few older clients. I'd recommend we use the suite from mozilla
> (https://wiki.mozilla.org/Security/Server_Side_TLS#Recommended_Server_Configurations)
> which is a good mix of security and compatibility:
> {code}
> ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA:AES256-SHA:AES:CAMELLIA:DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA
> {code}
> {quote}
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