TLS problem after upgrading from v2.2 to v2.3

[Joseph Tam]

Jan Vejvalka <jan.vejvalka at lfmotol.cuni.cz> writes:

>> Mine are below and they work just fine:
>>
>> 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-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:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!3DES:!MD5:!PSK:!SSLv2:!SSLv3

I notice all the ciphers use DH, so did you a generate a permanent DH key?

 	(https://wiki2.dovecot.org/Upgrading/2.3)

 	ssl-parameters.dat file is now obsolete. You should use ssl_dh
 	setting instead: ssl_dh=</etc/dovecot/dh.pem

 	You can convert an existing ssl-parameters.dat to dh.pem:

 	dd if=/var/lib/dovecot/ssl-parameters.dat bs=1 skip=88 | openssl dh -inform der > /etc/dovecot/dh.pem

Joseph Tam <jtam.home at gmail.com>