diff --git a/meshcentral-config-schema.json b/meshcentral-config-schema.json
index 024828e0..d1de0888 100644
--- a/meshcentral-config-schema.json
+++ b/meshcentral-config-schema.json
@@ -99,8 +99,10 @@
         "syslogjson": { "type": "string" },
         "webrtcConfig": {
           "type": "object",
+          "additionalProperties": false,
+          "description": "The STUN servers used for WebRTC, if not specified the Google and Mozilla servers and used when the server is not in LAN mode.",
           "properties": {
-            "iceServers": { "type": "array", "uniqueItems": true, "items": { "type": "object", "properties": { "urls": { "type": "string" } }, "required": [ "urls" ] } }
+            "iceServers": { "type": "array", "uniqueItems": true, "items": { "type": "object", "additionalProperties": false, "properties": { "urls": { "type": "string" } }, "required": [ "urls" ] } }
           },
           "required": [ "iceServers" ]
         },
diff --git a/meshcentral.js b/meshcentral.js
index 3baad577..df0e90a1 100644
--- a/meshcentral.js
+++ b/meshcentral.js
@@ -1141,6 +1141,7 @@ function CreateMeshCentralServer(config, args) {
         if (obj.args.redirport == null) obj.args.redirport = 80;
         if (obj.args.minifycore === 0) obj.args.minifycore = false;
         if (typeof args.agentidletimeout != 'number') { args.agentidletimeout = 150000; } else { args.agentidletimeout *= 1000 } // Default agent idle timeout is 2m, 30sec.
+        if ((obj.args.lanonly != true) && (obj.args.webrtconfig == null)) { obj.args.webrtconfig = { iceservers: [{ urls: 'stun:stun.l.google.com:19302' }, { urls: 'stun:stun.services.mozilla.com' }] }; } // Setup default WebRTC STUN servers
 
         // Setup a site administrator
         if ((obj.args.admin) && (typeof obj.args.admin == 'string')) {