diff options
19 files changed, 432 insertions, 4 deletions
@@ -0,0 +1,9 @@ +--- +- name: Configure the MX:es + hosts: MX + sudo: True + roles: + - { role: mx, inst: MX } + tags: + - mail + - postfix diff --git a/group_vars/all.yml b/group_vars/all.yml index a0c229e..fb7feb8 100644 --- a/group_vars/all.yml +++ b/group_vars/all.yml @@ -4,7 +4,7 @@ postfix_instance: # values are the name and group (optional) of the instance dedicated # to that role. IMAP: { name: mda } - MX: { name: mta-in, group: mta } + MX: { name: mx, group: mta } MTA-out: { name: mta-out,group: mta } MSA: { name: msa } diff --git a/main.yml b/main.yml new file mode 100644 index 0000000..bd04feb --- /dev/null +++ b/main.yml @@ -0,0 +1,75 @@ +- name: Install Postfix & Postgrey + apt: pkg={{ item }} + with_items: + - postfix + - postfix-pcre + - postfix-ldap + - postgrey + - libnet-ldap-perl + - libauthen-sasl-perl + +- name: Configure Postgrey + lineinfile: dest=/etc/default/postgrey + regexp='^POSTGREY_OPTS=' + line='POSTGREY_OPTS="--privacy --unix=/var/spool/postfix-{{ postfix_instance[inst].name }}/private/postgrey"' + owner=root group=root + mode=0644 + register: r + notify: + - Restart Postgrey + +- name: Start Postgrey + service: name=postgrey state=started + when: not r.changed + +- meta: flush_handlers + +- name: Configure Postfix + template: src=etc/postfix/main.cf.j2 + dest=/etc/postfix-{{ postfix_instance[inst].name }}/main.cf + owner=root group=root + mode=0644 + register: r + notify: + - Restart Postfix + +- name: Create directory /etc/postfix-.../virtual + file: path=/etc/postfix-{{ postfix_instance[inst].name }}/virtual + owner=root group=root + state=directory + mode=0755 + +- name: Copy lookups tables + copy: src=etc/postfix/virtual/{{ item }} + dest=/etc/postfix-{{ postfix_instance[inst].name }}/virtual/{{ item }} + owner=root group=root + mode=0644 + with_items: + - mailbox_domains.cf + - reserved_maps.pcre + - alias_maps.cf + - lists_maps.cf + - alias_catchall_maps.cf + - mailbox_maps.cf + - reserved_transport_maps + - transport_lists_maps.cf + notify: + - Restart Postfix + +- name: Compile the Reserved Transport Maps + postmap: cmd=postalias instance={{ postfix_instance[inst].name }} + src=/etc/postfix-{{ postfix_instance[inst].name }}/virtual/reserved_transport_maps db=cdb + owner=root group=root + mode=0644 + +- name: Copy reserved-alias.pl + copy: src=usr/local/sbin/reserved-alias.pl + dest=/usr/local/sbin/reserved-alias.pl + owner=root group=root + mode=0755 + +- name: Start Postfix + service: name=postfix state=started + when: not r.changed + +- meta: flush_handlers diff --git a/roles/common-LDAP/templates/etc/ldap/database.ldif.j2 b/roles/common-LDAP/templates/etc/ldap/database.ldif.j2 index 1970a99..8333032 100644 --- a/roles/common-LDAP/templates/etc/ldap/database.ldif.j2 +++ b/roles/common-LDAP/templates/etc/ldap/database.ldif.j2 @@ -106,11 +106,12 @@ olcAccess: to dn.children="ou=virtual,o=mailHosting,dc=fripost,dc=org" attrs=entry,objectClass,fvd,fvl,fripostMaildrop,fripostOptionalMaildrop,fripostLocalAlias filter=(&(|(objectClass=FripostVirtualDomain)(objectClass=FripostVirtualUser)(objectClass=FripostVirtualAlias)(objectClass=FripostVirtualList)(objectClass=FripostVirtualListCommand))(!(objectClass=FripostPendingEntry))(!(fripostIsStatusActive=FALSE))) by dn.exact="cn=Postfix,ou=services,o=mailHosting,dc=fripost,dc=org" =rsd + by dn.exact="username=postfix,cn=peercred,cn=external,cn=auth" =rsd by users =0 break +# # Search lists and domain owners olcAccess: to dn.exact="ou=virtual,o=mailHosting,dc=fripost,dc=org" attrs=entry - by dn.exact="cn=Postfix,ou=services,o=mailHosting,dc=fripost,dc=org" =s by dn.exact="username=postfix,cn=peercred,cn=external,cn=auth" =s by users =0 break # @@ -118,6 +119,7 @@ olcAccess: to dn.exact="ou=virtual,o=mailHosting,dc=fripost,dc=org" olcAccess: to dn.children="ou=virtual,o=mailHosting,dc=fripost,dc=org" attrs=entry,objectClass,fvd,fvl,fripostPostmaster,fripostOwner filter=(&(objectClass=FripostVirtualDomain)(!(objectClass=FripostPendingEntry))(!(fripostIsStatusActive=FALSE))) + by dn.exact="cn=Postfix,ou=services,o=mailHosting,dc=fripost,dc=org" =rsd by dn.exact="username=postfix,cn=peercred,cn=external,cn=auth" =rsd by users =0 break # diff --git a/roles/common/files/etc/postfix/master.cf b/roles/common/files/etc/postfix/master.cf index d9722ef..b8bc458 100644 --- a/roles/common/files/etc/postfix/master.cf +++ b/roles/common/files/etc/postfix/master.cf @@ -34,3 +34,5 @@ lmtp unix - - - - - lmtp anvil unix - - - - 1 anvil scache unix - - - - 1 scache 16132 inet n - - - - smtpd +reserved-alias unix - n n - - pipe + flags=Rhu user=mail argv=/usr/local/sbin/reserved-alias.pl ${original_recipient} @fripost.org diff --git a/roles/common/templates/etc/fail2ban/jail.local.j2 b/roles/common/templates/etc/fail2ban/jail.local.j2 index 0dcab8d..b92cb7a 100644 --- a/roles/common/templates/etc/fail2ban/jail.local.j2 +++ b/roles/common/templates/etc/fail2ban/jail.local.j2 @@ -16,6 +16,10 @@ action = %(action_)s # # JAILS # +# There is no risk to lock ourself out, since traffic between our machines goes +# through IPSec, and these packets are accepted before having a chance to enter +# fail2ban's chain. +# [ssh] @@ -47,3 +51,13 @@ banaction = iptables-allports port = anyport logpath = /var/log/auth.log maxretry = 6 + +{% if 'MX' in group_names %} +[postfix] + +enabled = true +port = smtp +filter = postfix +logpath = /var/log/mail.log +maxretry = 10 +{% endif %} diff --git a/roles/common/templates/etc/iptables/services.j2 b/roles/common/templates/etc/iptables/services.j2 index b1b7f0f..8a9409d 100644 --- a/roles/common/templates/etc/iptables/services.j2 +++ b/roles/common/templates/etc/iptables/services.j2 @@ -5,9 +5,13 @@ # (in|out|inout)[46]? (tcp|udp|..) (port|port:port|port,port) (port|port:port|port,port) inout udp 500 500 # ISAKMP - -in tcp {{ ansible_ssh_port|default('22') }} # SSH +#inout udp 4500 4500 # IPSec NAT Traversal out tcp 80,443 # HTTP/HTTPS out udp 53 # DNS out udp 67 # DHCP + +in tcp {{ ansible_ssh_port|default('22') }} # SSH +{% if 'MX' in group_names %} +in tcp 25 # SMTP +{% endif %} diff --git a/roles/common/templates/etc/postfix/main.cf.j2 b/roles/common/templates/etc/postfix/main.cf.j2 index 59bf0ba..a856843 100644 --- a/roles/common/templates/etc/postfix/main.cf.j2 +++ b/roles/common/templates/etc/postfix/main.cf.j2 @@ -1,9 +1,13 @@ ######################################################################## # Nullmailer configuration +# +# {{ ansible_managed }} +# Do NOT edit this file directly! smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU) biff = no readme_directory = no +mail_owner = postfix myorigin = /etc/mailname myhostname = {{ ansible_fqdn }} diff --git a/roles/mx/files/etc/postfix/virtual/alias_catchall_maps.cf b/roles/mx/files/etc/postfix/virtual/alias_catchall_maps.cf new file mode 100644 index 0000000..2de4667 --- /dev/null +++ b/roles/mx/files/etc/postfix/virtual/alias_catchall_maps.cf @@ -0,0 +1,8 @@ +server_host = ldapi://%2Fprivate%2Fldapi/ +version = 3 +search_base = fvd=%d,ou=virtual,o=mailHosting,dc=fripost,dc=org +scope = base +bind = sasl +sasl_mechs = EXTERNAL +query_filter = (&(ObjectClass=FripostVirtualDomain)(fvd=%d)(fripostOptionalMaildrop=*)) +result_attribute = fripostOptionalMaildrop diff --git a/roles/mx/files/etc/postfix/virtual/alias_maps.cf b/roles/mx/files/etc/postfix/virtual/alias_maps.cf new file mode 100644 index 0000000..aa26e18 --- /dev/null +++ b/roles/mx/files/etc/postfix/virtual/alias_maps.cf @@ -0,0 +1,7 @@ +server_host = ldapi://%2Fprivate%2Fldapi/ +version = 3 +search_base = fvl=%u,fvd=%d,ou=virtual,o=mailHosting,dc=fripost,dc=org +bind = sasl +sasl_mechs = EXTERNAL +query_filter = (&(ObjectClass=FripostVirtualAlias)(fvl=%u)) +result_attribute = fripostMaildrop diff --git a/roles/mx/files/etc/postfix/virtual/lists_maps.cf b/roles/mx/files/etc/postfix/virtual/lists_maps.cf new file mode 100644 index 0000000..a4657ec --- /dev/null +++ b/roles/mx/files/etc/postfix/virtual/lists_maps.cf @@ -0,0 +1,8 @@ +server_host = ldapi://%2Fprivate%2Fldapi/ +version = 3 +search_base = fvl=%u,fvd=%d,ou=virtual,o=mailHosting,dc=fripost,dc=org +scope = base +bind = sasl +sasl_mechs = EXTERNAL +query_filter = (&(|(ObjectClass=FripostVirtualList)(ObjectClass=FripostVirtualListCommand))(fvl=%u)(fripostLocalAlias=%u#%d)) +result_attribute = fripostLocalAlias diff --git a/roles/mx/files/etc/postfix/virtual/mailbox_domains.cf b/roles/mx/files/etc/postfix/virtual/mailbox_domains.cf new file mode 100644 index 0000000..d580cb9 --- /dev/null +++ b/roles/mx/files/etc/postfix/virtual/mailbox_domains.cf @@ -0,0 +1,9 @@ +server_host = ldapi://%2Fprivate%2Fldapi/ +version = 3 +search_base = fvd=%s,ou=virtual,o=mailHosting,dc=fripost,dc=org +scope = base +bind = sasl +sasl_mechs = EXTERNAL +query_filter = (&(ObjectClass=FripostVirtualDomain)(fvd=%s)) +result_attribute = fvd +result_format = OK diff --git a/roles/mx/files/etc/postfix/virtual/mailbox_maps.cf b/roles/mx/files/etc/postfix/virtual/mailbox_maps.cf new file mode 100644 index 0000000..0f0e0e4 --- /dev/null +++ b/roles/mx/files/etc/postfix/virtual/mailbox_maps.cf @@ -0,0 +1,9 @@ +server_host = ldapi://%2Fprivate%2Fldapi/ +version = 3 +search_base = fvl=%u,fvd=%d,ou=virtual,o=mailHosting,dc=fripost,dc=org +scope = base +bind = sasl +sasl_mechs = EXTERNAL +query_filter = (&(ObjectClass=FripostVirtualUser)(fvl=%u)) +result_attribute = fvl +result_format = OK diff --git a/roles/mx/files/etc/postfix/virtual/reserved_maps.pcre b/roles/mx/files/etc/postfix/virtual/reserved_maps.pcre new file mode 100644 index 0000000..58572d1 --- /dev/null +++ b/roles/mx/files/etc/postfix/virtual/reserved_maps.pcre @@ -0,0 +1,5 @@ +# These reserved aliases will always be redirected to us and the domain +# owner. +# TODO: check 'postmaster+test@fripost.org' +/^(?:postmaster|abuse)(?:\+.*)?@fripost\.org$/ admin@fripost.org +/^((?:postmaster|abuse)(?:\+.*)?)@/ $1 diff --git a/roles/mx/files/etc/postfix/virtual/reserved_transport_maps b/roles/mx/files/etc/postfix/virtual/reserved_transport_maps new file mode 100644 index 0000000..dce8710 --- /dev/null +++ b/roles/mx/files/etc/postfix/virtual/reserved_transport_maps @@ -0,0 +1,2 @@ +abuse reserved-alias: +postmaster reserved-alias: diff --git a/roles/mx/files/etc/postfix/virtual/transport_lists_maps.cf b/roles/mx/files/etc/postfix/virtual/transport_lists_maps.cf new file mode 100644 index 0000000..3cca999 --- /dev/null +++ b/roles/mx/files/etc/postfix/virtual/transport_lists_maps.cf @@ -0,0 +1,12 @@ +# Despite the index on 'fripostLocalAlias' it's a bit more inefficient, +# but more precise, than the alternative of using regexes here, and a +# plain hash on the list managers' side. +server_host = ldapi://%2Fprivate%2Fldapi/ +version = 3 +search_base = ou=virtual,o=mailHosting,dc=fripost,dc=org +scope = sub +bind = sasl +sasl_mechs = EXTERNAL +query_filter = (&(|(ObjectClass=FripostVirtualList)(ObjectClass=FripostVirtualListCommand))(fripostLocalAlias=%s)) +result_attribute = fripostLocalAlias +result_format = smtp:[127.0.0.1]:2345 diff --git a/roles/mx/files/usr/local/sbin/reserved-alias.pl b/roles/mx/files/usr/local/sbin/reserved-alias.pl new file mode 100755 index 0000000..c122c6d --- /dev/null +++ b/roles/mx/files/usr/local/sbin/reserved-alias.pl @@ -0,0 +1,110 @@ +#!/usr/bin/perl + +# Copyright © 2013 Guilhem Moulin <guilhem@fripost.org> +# +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. + +use warnings; +use strict; +use Net::LDAPI; +use Net::LDAP::Util qw/escape_filter_value ldap_explode_dn escape_dn_value/; +use Authen::SASL; + +if (!@ARGV or grep { $_ eq '-h' or $_ eq '--help' } @ARGV) { + # Help + print STDERR "Usage: $0 [original recipient] [additional recipient ...]\n"; + print STDERR "\n"; + print STDERR "The message read from the standard input is redirected to 'additional recipient',\n"; + print STDERR "and also forwarded to the domain owner if any. If the 'additional recipient' begins\n"; + print STDERR "with '\@', the localpart of 'original recipient' is prepended.\n"; + print STDERR "\n"; + print STDERR "This is mostly useful to comply to RFC 822 section 6.3 and RFC 2142 section\n"; + print STDERR "4 (to forward mails to 'admin\@' and 'postmaster\@' to the site admin in\n"; + print STDERR "addition to the virtual domain manager).\n"; + exit; +} + +# The original recipient +my $orig = shift; +$orig =~ /^([^@]+)\@(.+)$/ + or warn "Non fully qualified: $orig"; +my ($local,$domain) = ($1,$2); + +# The new recipient (typically, the admin site) +my @recipients = grep { $_ and $orig ne $_ } + # add localparts to domain + map { my $x = $_; + if ($x =~ /^\@/) { + if ($local) { + $x = $local.$x; + } + else { + undef $x; + } + } + $x + } + @ARGV; +# Die if we can't deliver to site admins +die "Error: Aborted delivery to '$orig' in attempt to break an alias expansion loop.\n" + unless @recipients; + +my @sendmail = ('/usr/sbin/sendmail', '-i', '-bm'); + +if (defined $domain) { + # Look for the domain owner/postmaster + my $ldap = Net::LDAPI->new(); + $ldap->bind( sasl => Authen::SASL->new(mechanism => 'EXTERNAL') ) + or die "Couldn't bind"; + + my @attrs = ( 'fripostPostmaster', 'fripostOwner' ); + my $mesg = $ldap->search( base => 'fvd='.escape_dn_value($domain).',' + .'ou=virtual,o=mailHosting,dc=fripost,dc=org' + , scope => 'base' + , deref => 'never' + , filter => '(&(objectClass=FripostVirtualDomain)' + .'(fvd='.escape_filter_value($domain).')'. + ')' + , attrs => \@attrs + ); + if ($mesg->code) { + warn $mesg->error; + } + elsif ($mesg->count != 1) { + # Note: this may happen for "$mydestination", but these mails + # are unlikely. We'll get a harmless warning at worst. + warn "Something weird happened when looking up domain '".$domain. + "'. Check your ACL."; + } + else { + my $entry = $mesg->pop_entry() // die "Cannot pop entry."; + foreach (@attrs) { + my $v = $entry->get_value($_, asref => 1) or next; + foreach my $dn (@$v) { + my $dn2 = ldap_explode_dn($dn, casefold => 'lower'); + my $l = $dn2->[0]->{fvl}; + my $d = $dn2->[1]->{fvd}; + if ($l and $d) { + push @recipients, $l.'@'.$d; + } + else { + warn "Invalid DN: $dn" + } + } + } + } + $ldap->unbind; +} + +exec (@sendmail, @recipients); diff --git a/roles/mx/handlers/main.yml b/roles/mx/handlers/main.yml new file mode 100644 index 0000000..21c736a --- /dev/null +++ b/roles/mx/handlers/main.yml @@ -0,0 +1,9 @@ +--- +- name: Restart Postgrey + service: name=postgrey state=restarted + +- name: Restart Postfix + service: name=postfix state=restarted + +- name: Reload Postfix + service: name=postfix state=reloaded diff --git a/roles/mx/templates/etc/postfix/main.cf.j2 b/roles/mx/templates/etc/postfix/main.cf.j2 new file mode 100644 index 0000000..5c44781 --- /dev/null +++ b/roles/mx/templates/etc/postfix/main.cf.j2 @@ -0,0 +1,139 @@ +######################################################################## +# MX configuration +# +# {{ ansible_managed }} +# Do NOT edit this file directly! + +smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU) +biff = no +readme_directory = no +mail_owner = postfix + +delay_warning_time = 4h +maximal_queue_lifetime = 5d + +myorigin = /etc/mailname +myhostname = mx{{ mxno | default('') }}.$mydomain +mydomain = {{ ansible_domain }} +append_dot_mydomain = no + +# Turn off all TCP/IP listener ports except that necessary for the mail +# exchange. +master_service_disable = !smtp.inet inet + +queue_directory = /var/spool/postfix-{{ postfix_instance[inst].name }} +data_directory = /var/lib/postfix-{{ postfix_instance[inst].name }} +multi_instance_group = {{ postfix_instance[inst].group }} +multi_instance_name = postfix-{{ postfix_instance[inst].name }} +multi_instance_enable = yes + +# This server is a Mail eXchange +mynetworks_style = host +inet_interfaces = all +inet_protocols = all + +# No local delivery +mydestination = +local_transport = error:5.1.1 Mailbox unavailable +alias_maps = +alias_database = +local_recipient_maps = + +message_size_limit = 67108864 +recipient_delimiter = + + +# Forward everything to our internal mailhub +{% if 'MTA-out' in group_names %} +relay_transport = lmtp:unix:private/mta-out +{% else %} +relayhost = [{{ MTA_out.IPv4 }}]:{{ MTA_out.port }} +{% endif %} +relay_domains = + +{% if 'LDA' in group_names %} +virtual_transport = lmtp:unix:private/lda +{% else %} +virtual_transport = smtp:[{{ LDA.IPv4 }}]:{{ LDA.port }} +{% endif %} + +virtual_mailbox_domains = ldap:$config_directory/virtual/mailbox_domains.cf +virtual_alias_maps = pcre:$config_directory/virtual/reserved_maps.pcre + ldap:$config_directory/virtual/alias_maps.cf + ldap:$config_directory/virtual/lists_maps.cf + ldap:$config_directory/virtual/alias_catchall_maps.cf +virtual_mailbox_maps = ldap:$config_directory/virtual/mailbox_maps.cf +mailbox_transport_maps = cdb:$config_directory/virtual/reserved_transport_maps + ldap:$config_directory/virtual/transport_lists_maps.cf + +# Pass the client information along to the content filter +local_header_rewrite_clients = +smtp_send_xforward_command = yes +smtp_destination_recipient_limit = 1000 +smtp_data_done_timeout = 1200s + +# Tunnel everything through IPSec +smtp_tls_security_level = none +smtp_bind_address = 172.16.0.1 + +# Virtual +smtpd_tls_security_level = may +smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem +smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key +smtpd_tls_CApath = /etc/ssl/certs/ +smtpd_tls_session_cache_database= btree:$data_directory/smtpd_tls_session_cache +smtpd_tls_received_header = yes +smtpd_tls_ask_ccert = yes +smtpd_tls_fingerprint_digest = sha1 +smtpd_tls_eecdh_grade = strong + +tls_random_source = dev:/dev/urandom + + +# http://en.linuxreviews.org/HOWTO_Stop_spam_using_Postfix +# http://www.howtoforge.com/block_spam_at_mta_level_postfix + +strict_rfc821_envelopes = yes +smtpd_delay_reject = yes +disable_vrfy_command = yes + +# UCE control +invalid_hostname_reject_code = 554 +multi_recipient_bounce_reject_code = 554 +non_fqdn_reject_code = 554 +relay_domains_reject_code = 554 +unknown_address_reject_code = 554 +unknown_client_reject_code = 554 +unknown_hostname_reject_code = 554 +unknown_local_recipient_reject_code = 554 +unknown_relay_recipient_reject_code = 554 +unknown_virtual_alias_reject_code = 554 +unknown_virtual_mailbox_reject_code = 554 +unverified_recipient_reject_code = 554 +unverified_sender_reject_code = 554 + + +smtpd_client_restrictions = + permit_mynetworks + reject_rbl_client zen.spamhaus.org + reject_rbl_client bl.spamcop.net + +smtpd_helo_required = yes +smtpd_helo_restrictions = + permit_mynetworks + reject_non_fqdn_helo_hostname + reject_invalid_helo_hostname + +smtpd_sender_restrictions = + reject_non_fqdn_sender + reject_unknown_sender_domain + +smtpd_recipient_restrictions = + # RFC requirements + reject_non_fqdn_recipient + reject_unknown_recipient_domain + permit_mynetworks + reject_unauth_destination + check_policy_service unix:private/postgrey + +smtpd_data_restrictions = + reject_unauth_pipelining |