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Code Issues Releases Activity

Apply strong TLS to opportunistic encryption as well

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This commit is contained in:
Pierre Jaury 2017-01-23 21:29:02 +01:00
parent 456e2dcc05
commit a74c9a1e87
1 changed files with 7 additions and 1 deletions
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8
postfix/conf/main.cf
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@ -29,6 +29,10 @@ relayhost = {{ RELAYHOST }}
# TLS
###############
# General TLS configuration
tls_high_cipherlist = EDH+CAMELLIA:EDH+aRSA:EECDH+aRSA+AESGCM:EECDH+aRSA+SHA256:EECDH:+CAMELLIA128:+AES128:+SSLv3:!aNULL:!eNULL:!LOW:!3DES:!MD5:!EXP:!PSK:!DSS:!RC4:!SEED:!IDEA:!ECDSA:kEDH:CAMELLIA128-SHA:AES128-SHA
tls_preempt_cipherlist = yes
# Only one key/certificate pair is used, SNI not being supported by all
# services and not a strong requirement. Also, TLS is enforced for submission
# and smtps in master.cf.
@ -40,9 +44,11 @@ smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
# Server-side TLS is hardened, it should be up to the client to update his or
# her TLS stack in order to connect to the mail server. Hardening is based on
# https://bettercrypto.org/static/applied-crypto-hardening.pdf
smtpd_tls_mandatory_protocols = !SSLv2, !SSLv3
smtpd_tls_protocols = !SSLv2, !SSLv3
smtpd_tls_ciphers = high
smtpd_tls_mandatory_ciphers = high
tls_high_cipherlist = EDH+CAMELLIA:EDH+aRSA:EECDH+aRSA+AESGCM:EECDH+aRSA+SHA256:EECDH:+CAMELLIA128:+AES128:+SSLv3:!aNULL:!eNULL:!LOW:!3DES:!MD5:!EXP:!PSK:!DSS:!RC4:!SEED:!IDEA:!ECDSA:kEDH:CAMELLIA128-SHA:AES128-SHA
# Outgoing TLS is more flexible because 1. not all receiving servers will
# support TLS, 2. not all will have and up-to-date TLS stack.