diff --git a/conf/sip_profiles/external.xml b/conf/sip_profiles/external.xml
index e055e39df2..6ed46fb052 100644
--- a/conf/sip_profiles/external.xml
+++ b/conf/sip_profiles/external.xml
@@ -45,6 +45,9 @@
     <param name="nonce-ttl" value="60"/>
     <param name="auth-calls" value="false"/>
     <param name="rtp-timeout-sec" value="1800"/>
+    <!--
+	DO NOT USE HOSTNAMES ONLY IP ADDRESSES IN THESE SETTINGS!
+    -->
     <param name="rtp-ip" value="$${local_ip_v4}"/>
     <param name="sip-ip" value="$${local_ip_v4}"/>
     <param name="ext-rtp-ip" value="$${external_rtp_ip}"/>
diff --git a/conf/sip_profiles/internal.xml b/conf/sip_profiles/internal.xml
index e5ff9bdee5..a1a2023853 100644
--- a/conf/sip_profiles/internal.xml
+++ b/conf/sip_profiles/internal.xml
@@ -47,9 +47,9 @@
     <param name="codec-prefs" value="$${global_codec_prefs}"/>
     <param name="use-rtp-timer" value="true"/>
     <param name="rtp-timer-name" value="soft"/>
-    <!-- ip address to use for rtp -->
+    <!-- ip address to use for rtp, DO NOT USE HOSTNAMES ONLY IP ADDRESSES -->
     <param name="rtp-ip" value="$${local_ip_v4}"/>
-    <!-- ip address to bind to -->
+    <!-- ip address to bind to, DO NOT USE HOSTNAMES ONLY IP ADDRESSES -->
     <param name="sip-ip" value="$${local_ip_v4}"/>
     <param name="hold-music" value="$${hold_music}"/>
     <!--<param name="apply-nat-acl" value="rfc1918"/>-->