[Dovecot] "Perfect Forward Secrecy" on Redhat/Fedora

Reindl Harald h.reindl at thelounge.net
Wed Oct 16 02:17:46 EEST 2013


RHEL/CentOS 6.5 will support ECDHE
Fedora currently makes the turnaround

no wonder that i burned down many hours:
https://bugzilla.redhat.com/show_bug.cgi?id=1019390
https://bugzilla.redhat.com/show_bug.cgi?id=319901#c108
______________________________

recent dovecot with also support older clients but
perfer best possible encryption for modern ones

ssl_prefer_server_ciphers = yes
ssl_cipher_list =
EECDH+ECDSA+AESGCM:EECDH+aRSA+AESGCM:EECDH+ECDSA+SHA384:EECDH+ECDSA+SHA256:EECDH+aRSA+SHA384:EECDH+aRSA+SHA256:EECDH+aRSA+RC4:EECDH:EDH+aRSA:RC4:!aNULL:!eNULL:!LOW:!3DES:!MD5:!EXP:!PSK:!SRP:!DSS:!SSLv2:@STRENGTH
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the same for Apache:

SSLHonorCipherOrder On
SSLCipherSuite
EECDH+ECDSA+AESGCM:EECDH+aRSA+AESGCM:EECDH+ECDSA+SHA384:EECDH+ECDSA+SHA256:EECDH+aRSA+SHA384:EECDH+aRSA+SHA256:EECDH+aRSA+RC4:EECDH:EDH+aRSA:RC4:!aNULL:!eNULL:!LOW:!3DES:!MD5:!EXP:!PSK:!SRP:!DSS

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