diff --git a/conf/sip_profiles/nat.xml b/conf/sip_profiles/nat.xml
index dd4a2f44de..a92059983d 100644
--- a/conf/sip_profiles/nat.xml
+++ b/conf/sip_profiles/nat.xml
@@ -2,6 +2,12 @@
   <gateways>
     <X-PRE-PROCESS cmd="include" data="nat/*.xml"/>
   </gateways>
+
+  <domains>
+    <!-- If you are behind nat and you have gateways to register please uncomment the line below -->
+    <!--<domain name="$${domain}" parse="true"/>-->
+  </domains>
+
   <settings>
     <param name="debug" value="1"/>
     <param name="rfc2833-pt" value="101"/>
@@ -12,12 +18,13 @@
     <param name="codec-prefs" value="$${global_codec_prefs}"/>
     <param name="use-rtp-timer" value="true"/>
     <param name="rtp-timer-name" value="soft"/>
-    <param name="rtp-ip" value="$${local_ip_v4}"/>
-    <param name="sip-ip" value="$${local_ip_v4}"/>
     <param name="manage-presence" value="true"/>
     <param name="inbound-codec-negotiation" value="generous"/>
     <param name="nonce-ttl" value="60"/>
-    <param name="auth-calls" value="true"/>
+    <param name="auth-calls" value="false"/>
+    <param name="rtp-ip" value="$${local_ip_v4}"/>
+    <param name="sip-ip" value="$${local_ip_v4}"/>
     <param name="ext-rtp-ip" value="$${external_rtp_ip}"/>
+    <param name="ext-sip-ip" value="$${external_sip_ip}"/>
   </settings>
 </profile>