diff --git a/site-cookbooks/kosmos-ejabberd/recipes/firewall.rb b/site-cookbooks/kosmos-ejabberd/recipes/firewall.rb
index 5d2ac3a..968da9b 100644
--- a/site-cookbooks/kosmos-ejabberd/recipes/firewall.rb
+++ b/site-cookbooks/kosmos-ejabberd/recipes/firewall.rb
@@ -2,28 +2,6 @@
 # Cookbook:: kosmos-ejabberd
 # Recipe:: firewall
 #
-# The MIT License (MIT)
-#
-# Copyright:: 2020, Kosmos Developers
-#
-# Permission is hereby granted, free of charge, to any person obtaining a copy
-# of this software and associated documentation files (the "Software"), to deal
-# in the Software without restriction, including without limitation the rights
-# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-# copies of the Software, and to permit persons to whom the Software is
-# furnished to do so, subject to the following conditions:
-#
-# The above copyright notice and this permission notice shall be included in
-# all copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-# THE SOFTWARE.
-
 include_recipe "kosmos-base::firewall"
 
 firewall_rule "ejabberd" do
@@ -34,12 +12,14 @@ end
 
 firewall_rule 'ejabberd_cluster' do
   port     [4369]
+  source   "10.1.1.0/24"
   protocol :tcp
   command  :allow
 end
 
 firewall_rule 'erlang_cluster' do
   port     [4200..4210]
+  source   "10.1.1.0/24"
   protocol :tcp
   command  :allow
 end