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class mail::tls::hardened inherits mail::tls {
# Hardened config
postfix::config { "smtpd_tls_ciphers": value => 'high' }
postfix::config { "smtp_tls_protocols": value => '!SSLv2, !SSLv3' }
postfix::config { "smtp_tls_mandatory_protocols": value => '!SSLv2, !SSLv3' }
postfix::config { "smtp_tls_note_starttls_offer": value => 'yes' }
postfix::config { "smtpd_tls_received_header": value => 'yes' }
postfix::config { "smtpd_tls_protocols": value => '!SSLv2, !SSLv3' }
postfix::config { "smtpd_tls_mandatory_protocols": value => '!SSLv2, !SSLv3' }
postfix::config { "smtpd_tls_session_cache_database": value => 'btree:${data_directory}/smtpd_scache' }
postfix::config { "smtp_tls_session_cache_database": value => 'btree:${data_directory}/smtp_scache' }
postfix::config { "tls_ssl_options": value => 'no_compression' }
postfix::config { "smtpd_tls_loglevel": value => '1' }
# DH parameters
postfix::config { "smtpd_tls_eecdh_grade": value => 'strong' }
#postfix::config { "smtpd_tls_dh1024_param_file":
# value => '/etc/ssl/dhparams/dhparams_1024.pem',
# require => Exec['openssl-postfix-gendh-1024'],
#}
# See https://leap.se/code/issues/4012
# https://drownattack.com/postfix.html
postfix::config { "smtpd_tls_dh1024_param_file":
value => '/etc/ssl/dhparams/dhparams_2048.pem',
require => Exec['openssl-postfix-gendh-2048'],
}
# Old file locations
file { [ '/etc/postfix/dh_512.pem', '/etc/postfix/dh_1024.pem' ]:
ensure => absent,
}
postfix::config { "smtpd_tls_dh512_param_file":
value => '/etc/ssl/dhparams/dhparams_512.pem',
require => Exec['openssl-postfix-gendh-512'],
}
ssl::dhparams { 'openssl-postfix-gendh-512':
size => '512',
}
ssl::dhparams { 'openssl-postfix-gendh-1024':
size => '1024',
}
ssl::dhparams { 'openssl-postfix-gendh-2048':
size => '2048',
}
postfix::config { "smtpd_tls_exclude_ciphers":
value => 'aNULL, MD5, DES, 3DES, DES-CBC3-SHA, RC4-SHA, AES256-SHA, AES128-SHA',
}
}
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