diff --git a/app.js b/app.js
index a27c3ca..b1a4d81 100644
--- a/app.js
+++ b/app.js
@@ -21,6 +21,12 @@ app.use(bodyParser.urlencoded({ extended: false }));
 app.use(cookieParser());
 app.use(express.static(path.join(__dirname, 'public')));
 
+if(glass_config.ip_ranges_to_allow) {
+	var ip_filter = require('express-ipfilter').IpFilter;
+	var ips = glass_config.ip_ranges_to_allow;
+	app.use(ip_filter(ips, {mode: 'allow'}));
+}
+
 /* Normal Web Routes */
 app.use('/', require('./routes/index'));
 app.use('/users', require('./routes/users'));
diff --git a/config/glass_config.json b/config/glass_config.json
index 9ea9574..159e611 100644
--- a/config/glass_config.json
+++ b/config/glass_config.json
@@ -8,5 +8,6 @@
   "shared_network_warning_threshold": "80",
   "slack_webhook_url": "https://hooks.slack.com/services/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",
   "slack_alert_channel": "#alerting",
-  "leases_per_minute_threshold": "1000"
+  "leases_per_minute_threshold": "1000",
+  "ip_ranges_to_allow": [""]
 }