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Fix postfix ciphers

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Alexandre Aubin 2020-04-21 20:20:53 +02:00 • committed by GitHub
parent 194a0bb187
commit 1a828c725f
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1 changed files with 8 additions and 2 deletions
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data/templates/postfix/main.cf
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@ -33,14 +33,20 @@ smtpd_tls_cert_file = /etc/yunohost/certs/{{ main_domain }}/crt.pem
smtpd_tls_key_file = /etc/yunohost/certs/{{ main_domain }}/key.pem
smtpd_tls_mandatory_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1
smtpd_tls_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1
smtpd_tls_mandatory_ciphers = medium
# smtpd_tls_mandatory_ciphers = medium # (c.f. below)
# curl https://ssl-config.mozilla.org/ffdhe2048.txt > /path/to/dhparam.pem
# not actually 1024 bits, this applies to all DHE >= 1024 bits
# smtpd_tls_dh1024_param_file = /path/to/dhparam.pem
tls_medium_cipherlist = ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384
# This custom medium cipherlist recommendation only works if we have a DH ... which we don't, c.f. https://github.com/YunoHost/issues/issues/93
# On the other hand, the postfix doc strongly discourage tweaking this list ... So whatever, let's keep the mandatory_ciphers to high like we did before applying the Mozilla recommendation ...
#tls_medium_cipherlist = ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384
tls_preempt_cipherlist = no
# Custom Yunohost stuff ... because we can't use the recommendation about medium cipher list ...
smtpd_tls_mandatory_ciphers=high
smtpd_tls_eecdh_grade = ultra
###############################################################################
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtpd_tls_loglevel=1