diff --git a/README.md b/README.md
index c4002c2..3f7f306 100644
--- a/README.md
+++ b/README.md
@@ -6,5 +6,13 @@ kamailio configurations and associated files for various usecases and role that
 * Barebonde SIP Server - use bare minimum modules and replies to any incoming call , no relay or proxy , no nat etc
 * REGISTER handle - just replies 300 ok to every REGISTER type request method
 * Stateful transaction handle 
+* Simple Relay - relays incoming SIP messages to another end
+* Record routing
+* NAT handle 
+* REGISTER and Userloc
+* RTPENgine media proxy
+* Accounting 
+* WebRTC WS SIP Server
+
 
 Note : Used kamailio v5.x , many old exmaples and sample configs from older wiki sources have been updated here too
\ No newline at end of file
diff --git a/register and userlocation /kamailio_register_userloc.cfg b/register and userlocation /kamailio_register_userloc.cfg
index b747e06..ea509c9 100644
--- a/register and userlocation /kamailio_register_userloc.cfg	
+++ b/register and userlocation /kamailio_register_userloc.cfg	
@@ -2,8 +2,8 @@
 
 ####### Defined Values #########
 
-#!substdef "!MY_IP_ADDR!10.130.42.37!g"
-#!substdef "!MY_EXTERNAL_IP!18.206.8.99!g"
+#!substdef "!MY_IP_ADDR!kamailio_pvtip!g"
+#!substdef "!MY_EXTERNAL_IP!kamailio_ip!g"
 #!substdef "!MY_UDP_PORT!5060!g"
 #!substdef "!MY_TCP_PORT!5060!g"
 #!substdef "!MY_UDP_ADDR!udp:MY_IP_ADDR:MY_UDP_PORT!g"
diff --git a/simple relay with flags/kamailio_relay_with_auth.cfg b/simple relay with flags/kamailio_relay_with_auth.cfg
index a7f9a14..2df4749 100644
--- a/simple relay with flags/kamailio_relay_with_auth.cfg	
+++ b/simple relay with flags/kamailio_relay_with_auth.cfg	
@@ -15,7 +15,7 @@ rev_dns=no      # (cmd. line: -R)
 children=4
 fifo="/tmp/ser_fifo"
 
-listen=10.130.42.37
+listen=kamailio_pvtip
 port=5068
 
 # ------------------ module loading ----------------------------------
diff --git a/simple relay with flags/kamailio_relay_with_flagsset.cfg b/simple relay with flags/kamailio_relay_with_flagsset.cfg
index a9141a7..a8c0767 100644
--- a/simple relay with flags/kamailio_relay_with_flagsset.cfg	
+++ b/simple relay with flags/kamailio_relay_with_flagsset.cfg	
@@ -2,8 +2,8 @@
 
 ####### Defined Values #########
 
-#!substdef "!MY_IP_ADDR!10.130.42.37!g"
-#!substdef "!MY_EXTERNAL_IP!18.206.8.99!g"
+#!substdef "!MY_IP_ADDR!kamailio_pvtip!g"
+#!substdef "!MY_EXTERNAL_IP!kamailio_ip!g"
 #!substdef "!MY_UDP_PORT!5060!g"
 #!substdef "!MY_TCP_PORT!5060!g"
 #!substdef "!MY_UDP_ADDR!udp:MY_IP_ADDR:MY_UDP_PORT!g"
@@ -27,7 +27,7 @@ log_stderror=yes
 children=4
 #fifo="/tmp/ser_fifo"
 
-listen=10.130.42.37
+listen=kamailio_pvtip
 port=5060
 mpath = "/usr/local/lib64/kamailio/modules/:/usr/lib/x86_64-linux-gnu/kamailio/modules/"