; **************************************************************************
; * Global options                                                         *
; **************************************************************************

; setuid()/setgid() to the specified user/group in daemon mode
setuid = stunnel4
setgid = stunnel4

; PID is created inside the chroot jail
pid = /var/run/stunnel4/munin-master.pid

; 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/stunnel/certs/munin-{{ inventory_hostname_short }}.pem
key  = /etc/stunnel/certs/munin-{{ inventory_hostname_short }}.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

; 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)               *
; **************************************************************************

{% set n = 0 %}
{% for node in groups.all | sort %}
{% set n = n + 1 %}
{% if node != inventory_hostname %}
[{{ hostvars[node].inventory_hostname_short }}]
accept  = 127.0.{{ n }}.1:4994
connect = {{ node }}:4949
delay   = yes
CAfile  = /etc/stunnel/certs/munin-{{ hostvars[node].inventory_hostname_short }}.pem
{% endif %}

{% endfor %}

; vim:ft=dosini