diff --git a/manifests/system.pp b/manifests/system.pp
index c0bc708359d8c57c16fd0aaf8eb6245d7902b9b6..fa8bce621904e8b24c3546959e5ab7f76acb59ff 100644
--- a/manifests/system.pp
+++ b/manifests/system.pp
@@ -28,6 +28,19 @@ class analysator::system::nat {
     value  => '1',
   }
 
+  [
+    $analysator::system::internal_iface,
+    $analysator::system::public_iface,
+    $analysator::system::ib_iface,
+  ].each |$iface| {
+    ['4', '6'].each |$family| {
+      sysctl { "net.ipv${family}.conf.${iface}.forwarding":
+        ensure => present,
+        value  => '1',
+      }
+    }
+  }
+
   firewall { '200 forward internal':
     chain    => 'FORWARD',
     iniface  => $analysator::system::internal_iface,