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Code Issues Releases Wiki Activity

Upgrade TLS settings

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This commit is contained in:
Joshua Tauberer
2019-12-01 17:49:36 -05:00
parent 8567a9b719
commit f53b18ebb9
6 changed files with 39 additions and 21 deletions
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11
setup/mail-dovecot.sh
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@@ -78,16 +78,15 @@ tools/editconf.py /etc/dovecot/conf.d/10-auth.conf \
"auth_mechanisms=plain login"
# Enable SSL, specify the location of the SSL certificate and private key files.
# Disable obsolete SSL protocols and allow only good ciphers per http://baldric.net/2013/12/07/tls-ciphers-in-postfix-and-dovecot/.
# Enable strong ssl dh parameters
# Use Mozilla's "Intermediate" recommendations at https://ssl-config.mozilla.org/#server=dovecot&server-version=2.2.33&config=intermediate&openssl-version=1.1.1,
# except that the current version of Dovecot does not have a TLSv1.3 setting, so we only use TLSv1.2.
tools/editconf.py /etc/dovecot/conf.d/10-ssl.conf \
ssl=required \
"ssl_cert=<$STORAGE_ROOT/ssl/ssl_certificate.pem" \
"ssl_key=<$STORAGE_ROOT/ssl/ssl_private_key.pem" \
"ssl_protocols=!SSLv3" \
"ssl_cipher_list=ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES256-SHA:ECDHE-ECDSA-DES-CBC3-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:DES-CBC3-SHA:!DSS" \
"ssl_prefer_server_ciphers=yes" \
"ssl_protocols=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" \
"ssl_prefer_server_ciphers=no" \
"ssl_dh_parameters_length=2048"
# Disable in-the-clear IMAP/POP because there is no reason for a user to transmit