From 5fa05ef82d7f502f4aa0eeee6f9c9b4ce0792234 Mon Sep 17 00:00:00 2001
From: FusionPBX <markjcrane@gmail.com>
Date: Fri, 9 Apr 2021 11:21:08 -0600
Subject: [PATCH] Prevent calls that are not coming from the SIP proxy.

This prevents calls that are often referred to as ghost calls.
---
 resources/templates/provision/grandstream/grp261x/{$mac}.xml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/resources/templates/provision/grandstream/grp261x/{$mac}.xml b/resources/templates/provision/grandstream/grp261x/{$mac}.xml
index 7f5c6c5d1a..68dbecda4f 100644
--- a/resources/templates/provision/grandstream/grp261x/{$mac}.xml
+++ b/resources/templates/provision/grandstream/grp261x/{$mac}.xml
@@ -370,7 +370,7 @@
 
 		<!-- Accept Incoming SIP from Proxy Only  -->
 		<!-- Yes, No -->
-		<item name="account.{$line}.sip.validate.incomingServer">No</item>
+		<item name="account.{$line}.sip.validate.incomingServer">Yes</item>
 
 		<!-- Authenticate Incoming INVITE -->
 		<!-- Yes, No -->
@@ -3036,4 +3036,4 @@
 			<item name="pks.ext.{$row.device_key_id}.value">{$row.device_key_value}</item>
 		{/for}
 	</config>
-</gs_provision>
\ No newline at end of file
+</gs_provision>