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; **************************************************************************
; * Global options *
; **************************************************************************
; setuid()/setgid() to the specified user/group in daemon mode
setuid = stunnel4
setgid = stunnel4
; PID is created inside the chroot jail
pid =
foreground = yes
; Only log messages at severity warning (4) and higher
debug = 4
; **************************************************************************
; * Service defaults may also be specified in individual service sections *
; **************************************************************************
; Certificate/key is needed in server mode and optional in client mode
cert = /etc/postfix/ssl/{{ ansible_fqdn }}.pem
key = /etc/postfix/ssl/{{ ansible_fqdn }}.key
client = yes
socket = a:SO_BINDTODEVICE=lo
; Some performance tunings
socket = l:TCP_NODELAY=1
socket = r:TCP_NODELAY=1
; Prevent MITM attacks
verify = 4
; Disable support for insecure protocols
options = NO_SSLv2
options = NO_SSLv3
options = NO_TLSv1
options = NO_TLSv1.1
options = NO_COMPRESSION
; These options provide additional security at some performance degradation
options = SINGLE_ECDH_USE
options = SINGLE_DH_USE
; Select permitted SSL ciphers
ciphers = EECDH+AESGCM:!MEDIUM:!LOW:!EXP:!aNULL:!eNULL
; **************************************************************************
; * Service definitions (remove all services for inetd mode) *
; **************************************************************************
[smtp]
accept = localhost:2525
connect = outgoing.fripost.org:{{ postfix_instance.out.port }}
CAfile = /etc/stunnel/certs/smtp.pem
protocol = smtp
; vim:ft=dosini
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