diff options
| -rw-r--r-- | puppet/modules/postfwd/files/postfwd_default | 19 | ||||
| -rw-r--r-- | puppet/modules/postfwd/manifests/init.pp | 49 | ||||
| -rw-r--r-- | puppet/modules/postfwd/templates/postfwd.cf.erb | 31 | ||||
| -rw-r--r-- | puppet/modules/site_postfix/manifests/mx.pp | 1 |
4 files changed, 100 insertions, 0 deletions
diff --git a/puppet/modules/postfwd/files/postfwd_default b/puppet/modules/postfwd/files/postfwd_default new file mode 100644 index 00000000..79d0e3de --- /dev/null +++ b/puppet/modules/postfwd/files/postfwd_default @@ -0,0 +1,19 @@ +### This file managed by Puppet +# Global options for postfwd(8). + +# Set to '1' to enable startup (daemon mode) +STARTUP=1 + +# Config file +CONF=/etc/postfix/postfwd.cf +# IP where listen to +INET=127.0.0.1 +# Port where listen to +PORT=10040 +# run as user postfwd +RUNAS="postfw" +# Arguments passed on start (--daemon implied) +# RISEUP disable summary and cache-no-size +#ARGS="--summary=600 --cache=600 --cache-rdomain-only --cache-no-size" +ARGS="--cache=600 --cache-rdomain-only --no-rulestats" + diff --git a/puppet/modules/postfwd/manifests/init.pp b/puppet/modules/postfwd/manifests/init.pp new file mode 100644 index 00000000..b00bb071 --- /dev/null +++ b/puppet/modules/postfwd/manifests/init.pp @@ -0,0 +1,49 @@ +# This class provides rate-limiting for outgoing SMTP, using postfwd +# it is configured with some limits that seem reasonable for a generic +# use-case. Each of the following applies to sasl_authenticated users: +# +# . 150 recipients at a time +# . no more than 50 messages in 60 minutes +# . no more than 250 recipients in 60 minutes. +# +# This class could be easily extended to add overrides to these rules, +# maximum sizes per client, or additional rules +class postfwd { + + ensure_packages(['libnet-server-perl', 'libnet-dns-perl', 'postfwd']) + + file { + '/etc/default/postfwd': + source => 'puppet:///modules/postfwd/postfwd', + mode => '0644', + owner => root, + group => root, + require => Package['postfwd']; + + '/etc/postfix/postfwd.cf': + content => template('postfwd/postfwd.cf.erb'), + mode => '0644', + owner => root, + group => root, + require => File['/etc/postfix']; + } + + exec { + '/etc/init.d/postfwd reload': + refreshonly => true, + subscribe => [ File['/etc/postfix/postfwd.cf'], + File['/etc/default/postfwd'] ]; + } + + service { + 'postfwd': + ensure => running, + name => postfwd, + pattern => '/usr/sbin/postfwd', + enable => true, + hasrestart => true, + hasstatus => false, + require => [ File['/etc/default/postfwd'], + File['/etc/postfix/postfwd.cf']]; + } +} diff --git a/puppet/modules/postfwd/templates/postfwd.cf.erb b/puppet/modules/postfwd/templates/postfwd.cf.erb new file mode 100644 index 00000000..6460994a --- /dev/null +++ b/puppet/modules/postfwd/templates/postfwd.cf.erb @@ -0,0 +1,31 @@ +### This file managed by Puppet +# Before deploying a rule +# 1. test with an additional "sender==test@domain.org;" in the rule so it +# only applies to your test account +# 2. then when ready to test for all users, use WARN and watch the logs +# for a few days and make sure it working the way you like +# 3. Then when ready to deploy for real set a proper error code + +## Overrides - make like the following example +# id=exampleuser; sasl_username==exampleuser; action=dunno + +## Rules that apply to all senders +# Recipient Per Message Limit +# We only receive mail via smtp from sasl authenticated users +# directly. We want to limit to a lower amount to prevent phished accounts +# spamming +id=RCPTSENDER; recipient_count=150; action=REJECT Too many recipients, please try again. Contact http://<%= @domain %>/tickets/new if this is in error. ERROR:RCPTSENDER + +# Message Rate Limit +# This limits sasl authenticated users to no more than 50/60mins +# NOTE: sasl_username needs to be set to something or this check will fail +id=MSGRATE ; sasl_username=!!(^$); action==rate($$sasl_username/100/3600/450 4.7.1 exceeded message rate. Contact Contact http://<%= @domain %>/tickets/new if this is in error. ERROR:MSGRATE) + +# Total Recipient Rate Limit +# This adds up the recipients for all the sasl authenticated users messages +# and can't exceed more than 250/60min +# NOTE: sasl_username needs to be set to something or this check will fail +id=RCPTRATE ; sasl_username=!!(^$); action==rcpt($$sasl_username/500/3600/450 4.7.1 exceeded message rate. Contact http://<%= @domain %>/tickets/new if this is in error. ERROR:RCPTRATE) + +# Size per client Limit +id=SENDSIZE ; state==END_OF_DATA ; client_address==!!(10.0.1.0/24); action==size($$client_address/314572800/3600/450 4.7.1 Sorry you have sent too much data. Contact http://<%= @domain %>/tickets/new if this is in error. ERROR:SENDSIZE) diff --git a/puppet/modules/site_postfix/manifests/mx.pp b/puppet/modules/site_postfix/manifests/mx.pp index edaa506f..71d61621 100644 --- a/puppet/modules/site_postfix/manifests/mx.pp +++ b/puppet/modules/site_postfix/manifests/mx.pp @@ -62,6 +62,7 @@ class site_postfix::mx { include site_postfix::mx::static_aliases include site_postfix::mx::rewrite_openpgp_header include clamav + include postfwd # greater verbosity for debugging, take out for production #include site_postfix::debug |