diff --git a/dhcp/manifests/init.pp b/dhcp/manifests/init.pp
index 9323270..1e65604 100644
--- a/dhcp/manifests/init.pp
+++ b/dhcp/manifests/init.pp
@@ -1,4 +1,6 @@
 
+# Install common parts of DHCP server
+#
 class dhcp::server::common {
 
     case $::operatingsystem {
@@ -83,16 +85,45 @@ class dhcp::server::common {
             OpenBSD => "/usr/local/sbin/dhcpd",
             default => undef,
         },
-        start   => $operatingsystem ? {
-            OpenBSD => "/usr/local/sbin/dhcpd -q",
+        start   => $::operatingsystem ? {
+            OpenBSD => $dhcp_server_interface ? {
+                ""      => "/usr/local/sbin/dhcpd -q",
+                default => "/usr/local/sbin/dhcpd -q ${dhcp_server_interface}",
+            },
             default => undef,
         },
         require => Package["dhcp"],
     }
 
+    if $dhcp_server_interface {
+        case $::operatingsystem {
+            "fedora","centos": {
+                file { "/etc/sysconfig/dhcpd":
+                    ensure  => present,
+                    content => "DHCPDARGS=${dhcp_server_interface}\n",
+                    mode    => "0644",
+                    owner   => "root",
+                    group   => "root",
+                    notify  => Service["dhcpd"],
+                }
+            }
+            "openbsd": {}
+            default: {
+                fail("Variable \${dhcp_server_interface} not supported in ${::operatinsystem}")
+            }
+        }
+    }
+
 }
 
 
+# Install DHCP server with static config.
+#
+# === Global variables
+#
+#   $dhcp_server_interface:
+#       Interface that DHCP server should listen. Defaults to all.
+#
 class dhcp::server inherits dhcp::server::common {
 
     file { "dhcpd.conf":
@@ -112,6 +143,13 @@ class dhcp::server inherits dhcp::server::common {
 }
 
 
+# Install DHCP server and generate config from LDAP.
+#
+# === Global variables
+#
+#   $dhcp_server_interface:
+#       Interface that DHCP server should listen. Defaults to all.
+#
 class dhcp::server::ldap inherits dhcp::server::common {
 
     include python