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feat(ssl_tls): updated dovecot and postfix accepted ciphers

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used https://ssl-config.mozilla.org/ to generate recommended
ciphers config for dovecot and postfix.

postfix set to use medium ciphers due to possibility of smtp
servers not being updated to latest.

MR !9
This commit is contained in:
Jon Lockwood
2022-02-19 10:41:53 +09:30
parent 3741b92606
commit 2a222df778
2 changed files with 6 additions and 1 deletions
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4
dockerfile
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@ -193,10 +193,12 @@ RUN postconf -e "maillog_file=/var/log/postfix.log" \
&& postconf -e "smtpd_delay_reject = yes" \ && postconf -e "smtpd_delay_reject = yes" \
&& postconf -e "disable_vrfy_command = yes" \ && postconf -e "disable_vrfy_command = yes" \
# use secure protocols and cyphers # use secure protocols and cyphers
# Generated by https://ssl-config.mozilla.org/
#&& postconf -e "smtpd_tls_mandatory_ciphers=high" \
&& postconf -e "smtpd_tls_protocols=!SSLv2,!SSLv3,!TLSv1,!TLSv1.1" \ && postconf -e "smtpd_tls_protocols=!SSLv2,!SSLv3,!TLSv1,!TLSv1.1" \
&& postconf -e "smtp_tls_protocols=!SSLv2,!SSLv3,!TLSv1,!TLSv1.1" \ && postconf -e "smtp_tls_protocols=!SSLv2,!SSLv3,!TLSv1,!TLSv1.1" \
&& postconf -e "smtpd_tls_mandatory_ciphers=high" \
&& postconf -e "smtpd_tls_mandatory_protocols=!SSLv2,!SSLv3,!TLSv1,!TLSv1.1" \ && postconf -e "smtpd_tls_mandatory_protocols=!SSLv2,!SSLv3,!TLSv1,!TLSv1.1" \
&& postconf -e "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" \
# SPF postfix Settings # SPF postfix Settings
&& postconf -e "policyd-spf_time_limit=3600" \ && postconf -e "policyd-spf_time_limit=3600" \
# Connection defaults to reject where possible/advised # Connection defaults to reject where possible/advised

3
include/etc/dovecot/conf.d/10-ssl.conf
View File

@ -15,3 +15,6 @@ ssl_dh = </certs/dovecot/dh.pem
ssl_cert = </certs/dovecot/cert.pem ssl_cert = </certs/dovecot/cert.pem
ssl_key = </certs/dovecot/key.pem ssl_key = </certs/dovecot/key.pem
# Generated by https://ssl-config.mozilla.org/
ssl_min_protocol = TLSv1.2
ssl_cipher_list = 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