Correct settings for ssl protocols" and "ssl ciphers"
I have the following two settings in my "10-ssl.conf" file
# SSL protocols to use ssl_protocols = !SSLv2
# SSL ciphers to use ssl_cipher_list = ALL:!LOW:!SSLv2:!EXP:!aNULL
I have seen different configurations while Googling. I am wondering what the consensus is for the best settings for these two items. What do the developers recommend?
Thanks!
-- Jerry
On Tuesday 17 of January 2017, Jerry wrote:
I have the following two settings in my "10-ssl.conf" file
# SSL protocols to use ssl_protocols = !SSLv2
# SSL ciphers to use ssl_cipher_list = ALL:!LOW:!SSLv2:!EXP:!aNULL
I have seen different configurations while Googling. I am wondering what the consensus is for the best settings for these two items. What do the developers recommend?
Likely the same or similar to what browsers recommend.
See https://wiki.mozilla.org/Security/Server_Side_TLS https://wiki.mozilla.org/Security/Server_Side_TLS#Intermediate_compatibility...
Currently using:
ssl_cipher_list = 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-AES1 28-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:EC DHE-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-SHA256:AES256-SHA256: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
ssl_protocols = !SSLv2 !SSLv3
Thanks!
-- Arkadiusz Miśkiewicz, arekm / ( maven.pl | pld-linux.org )
On Tue, Jan 17, 2017 at 07:55:15AM -0500, Jerry wrote:
I have the following two settings in my "10-ssl.conf" file
# SSL protocols to use ssl_protocols = !SSLv2
# SSL ciphers to use ssl_cipher_list = ALL:!LOW:!SSLv2:!EXP:!aNULL
I have seen different configurations while Googling. I am wondering what the consensus is for the best settings for these two items. What do the developers recommend?
Not a developer, but I use the settings from https://cipherli.st, namely:
ssl = yes
ssl_cert = </etc/dovecot.cert
ssl_key = </etc/dovecot.key
ssl_protocols = !SSLv2 !SSLv3
ssl_cipher_list = AES128+EECDH:AES128+EDH
ssl_prefer_server_ciphers = yes # >Dovecot 2.2.6
ssl_dh_parameters_length = 4096 # >Dovecot 2.2Thanks!
-- Jerry
-- For more information, please reread.
On Tue, Jan 17, 2017 at 07:55:15AM -0500, Jerry wrote:
I have seen different configurations while Googling. I am wondering what the consensus is for the best settings for these two items. What do the developers recommend?
According to my own reference https://arxiv.org/abs/1407.2168 I use: ssl_dh_parameters_length = 4096 ssl_protocols = !SSLv2 !SSLv3 ssl_cipher_list = ECDH@STRENGTH:DH@STRENGTH:HIGH:!RC4:!MD5:!DES:!aNULL:!eNULL
You may want to disable 3DES nowadays.
-- Emmanuel Dreyfus manu@netbsd.org
participants (4)
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Arkadiusz Miśkiewicz
-
Darac Marjal
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Emmanuel Dreyfus
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Jerry