asterisk: add pjsip.conf & res_stun_monitor.conf and its .sample

asterisk/conf/modules.conf

@@ -1,7 +1,8 @@
 ;
 ; /etc/asterisk/modules.conf
 ;
-; This is the same as the sample but without the text.
+; This is the same as the sample but without text.
+;
 [modules]
 autoload=yes
 

asterisk/conf/pjsip.conf

@@ -0,0 +1,21 @@
+;
+; /etc/asterisk/pjsip.conf
+;
+; Inspired by/Stolen from https://www.sacredheartsc.com/blog/building-a-personal-voip-system/
+;
+[global]
+; A type is always required (say the docs).
+type = global
+
+; KYE (Know your endpoint ;) ) ordering.
+endpoint_identifier_order = ip,username,anonymous
+
+; Basic UDP Transport.
+[ipv4-udp]
+type = transport
+bind = 0.0.0.0:15000
+protocol = udp
+local_net = 172.16.0.0/12
+local_net = 192.168.0.0/16
+local_net = 127.0.0.0/8
+local_net = 10.0.0.0/8

asterisk/conf/res_stun_monitor.conf

@@ -0,0 +1,9 @@
+;
+; /etc/asterisk/rtp.conf
+;
+; This really isn't needed unless you're behind NAT.
+;
+[general]
+
+stunaddr = stun.aa.net.uk:3478
+stunrefresh = 30

asterisk/samples/conf/res_stun_monitor.conf.sample

@@ -0,0 +1,27 @@
+;
+; Configuration file for the res_stun_monitor module
+;
+; The res_stun_monitor module sends STUN requests to a configured STUN server
+; periodically.  If the monitor detects a change in the external IP address or port
+; provided by the STUN server an event is sent out internally within Asterisk
+; to alert all listeners to that event of the change.
+
+; The current default listeners for the network change event include chan_sip
+; and chan_iax.  Both of these channel drivers by default react to this event
+; by renewing all outbound registrations.  This allows the endpoints Asterisk
+; is registering with to become aware of the address change and know the new
+; location.
+;
+[general]
+;
+; ---- STUN Server configuration ---
+;  Setting the 'stunaddr' option to a valid address enables the STUN monitor.
+;
+;stunaddr = mystunserver.com    ; Address of the STUN server to query.
+                                ; Valid form:
+                                ;   [(hostname | IP-address) [':' port]]
+                                ; The port defaults to the standard STUN port (3478).
+                                ; Set to an empty value to disable STUN monitoring.
+                                ;   Default is disabled.
+;stunrefresh = 30               ; Number of seconds between STUN refreshes.
+                                ;   Default is 30.