On Jul 29, 2018, at 6:02 PM, Alexander Dalloz ad+lists@uni-x.org wrote:
Am 29.07.2018 um 21:02 schrieb J Doe:
Hello, I have a question regarding SSL/TLS settings for Dovecot version 2.2.22. In: 10-ssl.conf there are two parameters: ssl_protocols ssl_cipher_list ssl_protocols is commented with “SSL protocol to use” and ssl_cipher_list is commented with “SSL ciphers to use”. If I want to disable SSLv3, for example, do I need to use both parameters or will disabling SSLv3 ciphers in ssl_cipher_list do the same thing ? So is: ssl_cipher_list = !SSLv3 …equivalent to: ssl_protocols = !SSLv3 ssl_cipher_list = !SSLv3
No. SSLv3 is not a cipher but a protocol.
"ssl_protocols = !SSLv2 !SSLv3" is what you want to specify.
For ciphers you could define by ssl_cipher_list see "openssl ciphers -v”
Hi Alexander and list,
I think there may be a discrepancy in the documentation.
On the wiki on the “Dovecot SSL Configuration” page [1] under the section “SSL security settings” it says:
ssl_cipher_list = ALL:!LOW:!SSLv2:!EXP:!aNULLIn the conf.d/10-ssl.conf it states:
# SSL protocols to use
#ssl_protocols = !SSLv2
# SSL ciphers to use
#ssl_cipher_list = ALL:!LOW:!SSLv2:!EXP:!aNULLMy new question is:
1. Are the SSL/TLS protocols to use and/or exclude specified in “ssl_protocols”, “ssl_cipher_list” or both ?Thanks,
- J
Sources: [1] See: https://wiki2.dovecot.org/SSL/DovecotConfiguration