Hi thanks for your help!
Trying to set your same parameters, when restarting dovecot, gives the
error:
doveconf: Fatal: Error in configuration file /etc/dovecot/dovecot.conf
line 136: Unknown setting: ssl_prefer_server_ciphers
doveconf: Error: managesieve-login: dump-capability process returned 89
doveconf: Fatal: Error in configuration file /etc/dovecot/dovecot.conf
line 136: Unknown setting: ssl_prefer_server_ciphers
[....] Restarting IMAP/POP3 mail server: dovecotdoveconf: Fatal: Error
in configuration file /etc/dovecot/dovecot.conf line 136: Unknown
setting: ssl_prefer_server_ciphers
doveconf: Error: managesieve-login: dump-capability process returned 89
doveconf: Fatal: Error in configuration file /etc/dovecot/dovecot.conf
line 136: Unknown setting: ssl_prefer_server_ciphers
and if trying to comment the line with 'ssl_prefer_server_ciphers',
dovecot restarts fine but same problem as before, claws-mail can't
connect.
dovecot version is 2.1.7
any hints ?
On 2015-01-09 07:50, Philipp Resch wrote:
Am 09.01.2015 um 08:07 schrieb m...@ruggedinbox.com:
Hi all, when hardening dovecot against the POODLE vulnerability,
we followed the advise to disable SSL2 and SSL3
but this is giving problems with some email clients (claws-mail).
ssl_protocols = !SSLv2 !SSLv3
results in the following error:
dovecot: pop3-login: Disconnected (no auth attempts in 1 secs):
user=<>,
rip=XXX, lip=XXX, TLS handshaking: SSL_accept() failed:
error:1408A0C1:SSL routines:SSL3_GET_CLIENT_HELLO:no shared cipher,
session=<2C8jBjIMmQBVGNd1>
Our smtp server is postfix, can you please suggest a better
'ssl_protocols' and 'ssl_cipher_list' configuration ?
We are running Debian 7 Wheezy
Thank you,
RuggedInbox team
Hi,
this is my config on Wheezy. I don't know if it's 'best', but it works
for us:
# SSL protocols to use
ssl_protocols = !SSLv2 !SSLv3
# Prefer the server's order of ciphers over client's.
ssl_prefer_server_ciphers = yes
ssl_cipher_list =
ECDHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA:AES256-SHA:DHE-RSA-CAMELLIA128-SHA:DHE-RSA-CAMELLIA256-SHA:CAMELLIA128-SHA:CAMELLIA256-SHA:ECDHE-RSA-DES-CBC3-SHA:DES-CBC3-SHA:!SSLv2
Cheers,
Philipp
