Use a dedicated SMTP port for samhain.

It's unfortunate that samhain cannot use the sendmail binary, and wants
to use a inet socket instead. We use a custom port to avoid
conflicts with the usual SMTP port the MX:es need to listen on.
See also: /usr/share/doc/samhain/TODO.Debian

1 files changed, 4 insertions, 0 deletions

diff --git a/roles/common/templates/etc/postfix/main.cf.j2 b/roles/common/templates/etc/postfix/main.cf.j2
index 3169ac6..0922b49 100644
--- a/roles/common/templates/etc/postfix/main.cf.j2
+++ b/roles/common/templates/etc/postfix/main.cf.j2
@@ -26,32 +26,36 @@ local_recipient_maps =
 # All aliases are virtual
 default_database_type = cdb
 virtual_alias_maps    = cdb:/etc/aliases
 alias_database        = $virtual_alias_maps
 
 # Transform local FQDN addresses to addresses routable on the internet
 smtp_generic_maps = pcre:$config_directory/generic.pcre
 
 # Forward everything to our internal mailhub
 {% if 'MTA-out' in group_names %}
 relayhost = [127.0.0.1]:2525
 {% else %}
 relayhost = [outgoing.fripost.org]:2525
 {% endif %}
 
 # This server is for internal use only; external connections are
 # protected by IPSec already
 smtpd_tls_security_level = none
 smtp_tls_security_level  = none
 
+# Turn off all TCP/IP listener ports except that dedicated to
+# samhain(8), which sadly cannot use pickup through the sendmail binary.
+master_service_disable = !16132.inet inet
+
 {% set multi_instance = False %}
 {%- for g in postfix_instance.keys() | sort -%}
   {%- if g in group_names -%}
     {%- if not multi_instance -%}
       {%- set multi_instance = True -%}
 ## Other postfix instances
 multi_instance_wrapper     = $command_directory/postmulti -p --
 multi_instance_enable      = yes
 multi_instance_directories =
     {%- endif %} /etc/postfix-{{ postfix_instance[g].name }}
   {%- endif %}
 {% endfor %}