diff --git a/conf/sip_profiles/internal.xml b/conf/sip_profiles/internal.xml
index 00599ada14..3166538889 100644
--- a/conf/sip_profiles/internal.xml
+++ b/conf/sip_profiles/internal.xml
@@ -36,6 +36,7 @@
     <param name="sip-ip" value="$${local_ip_v4}"/>
     <param name="hold-music" value="$${hold_music}"/>
     <param name="apply-nat-acl" value="rfc1918"/>
+    <param name="aggressive-nat-detection" value="true"/>
     <!--<param name="enable-timer" value="false"/>-->
     <!--<param name="enable-100rel" value="false"/>-->
     <!--<param name="apply-inbound-acl" value="rfc1918"/>-->