Limit mail connections from smarthosts by address

[chef.git] / cookbooks / exim / recipes / default.rb

diff --git a/cookbooks/exim/recipes/default.rb b/cookbooks/exim/recipes/default.rb
index f1c9ddf22bb2269e7806531f299eab238027756a..789c4e253a1802b82d68e5e504480a914472b91b 100644 (file)
--- a/cookbooks/exim/recipes/default.rb
+++ b/cookbooks/exim/recipes/default.rb
@@ -25,12 +25,20 @@ package %w[
   exim4
   openssl
   ssl-cert
+  mailutils
 ]
 
 package "exim4-daemon-heavy" do
   only_if { ::File.exist?("/var/run/clamav/clamd.ctl") }
 end
 
+group "Debian-exim" do
+  action :modify
+  members "clamav"
+  append true
+  only_if { ::File.exist?("/var/run/clamav/clamd.ctl") }
+end
+
 group "ssl-cert" do
   action :modify
   members "Debian-exim"
@@ -77,19 +85,7 @@ end
 relay_from_hosts = node[:exim][:relay_from_hosts]
 
 if node[:exim][:smarthost_name]
-  search(:node, "roles:gateway") do |gateway|
-    allowed_ips = gateway.interfaces(:role => :internal).map do |interface|
-      "#{interface[:network]}/#{interface[:prefix]}"
-    end
-
-    node.default[:networking][:wireguard][:peers] << {
-      :public_key => gateway[:networking][:wireguard][:public_key],
-      :allowed_ips => allowed_ips,
-      :endpoint => "#{gateway.name}:51820"
-    }
-  end
-
-  search(:node, "exim_smarthost_via:#{node[:exim][:smarthost_name]}\\:*").each do |host|
+  search(:node, "exim_smarthost_via:*?").each do |host|
     relay_from_hosts |= host.ipaddresses(:role => :external)
   end
 
@@ -163,6 +159,14 @@ if node[:exim][:dkim_selectors]
   end
 end
 
+template "/etc/default/exim4" do
+  source "default.erb"
+  owner "root"
+  group "root"
+  mode "044"
+  notifies :restart, "service[exim4]"
+end
+
 template "/etc/exim4/exim4.conf" do
   source "exim4.conf.erb"
   owner "root"
@@ -208,11 +212,20 @@ remote_directory "/etc/exim4/noreply" do
   purge true
 end
 
+template "/etc/mail.rc" do
+  source "mail.rc.erb"
+  owner "root"
+  group "root"
+  mode "644"
+end
+
 munin_plugin "exim_mailqueue"
 munin_plugin "exim_mailstats"
 
 prometheus_exporter "exim" do
   port 9636
+  user "Debian-exim"
+  protect_proc "default"
 end
 
 if node[:exim][:smarthost_name]
@@ -227,10 +240,29 @@ if node[:exim][:smarthost_name]
     end
   end
 else
+  smarthosts_inet = []
+  smarthosts_inet6 = []
+
+  search(:node, "exim_smarthost_name:*?").each do |host|
+    smarthosts_inet |= host.ipaddresses(:role => :external, :family => :inet)
+    smarthosts_inet6 |= host.ipaddresses(:role => :external, :family => :inet6)
+  end
+
   node[:exim][:daemon_smtp_ports].each do |port|
     firewall_rule "accept-inbound-smtp-#{port}" do
       action :accept
-      source "bm:mail.openstreetmap.org"
+      family :inet
+      source "net:#{smarthosts_inet.sort.join(',')}"
+      dest "fw"
+      proto "tcp:syn"
+      dest_ports port
+      source_ports "1024:"
+    end
+
+    firewall_rule "accept-inbound-smtp-#{port}" do
+      action :accept
+      family :inet6
+      source "net:#{smarthosts_inet6.sort.join(',')}"
       dest "fw"
       proto "tcp:syn"
       dest_ports port