Improve connection status determination logic

core/controllers/ConnectionController.py

@@ -405,12 +405,26 @@ class ConnectionController:
         timeout = float(timeout)
         proxies = None
 
+        request_urls = [
+            Constants.PING_URL,
+            'https://hc1.simplifiedprivacy.net',
+            'https://hc2.simplifiedprivacy.org',
+            'https://hc3.hydraveil.net'
+        ]
+
         if port_number is not None:
             proxies = ConnectionController.get_proxies(port_number)
 
+        for request_url in request_urls:
+
             try:
-            requests.get(Constants.PING_URL, timeout=timeout, proxies=proxies)
+
+                requests.get(request_url, timeout=timeout, proxies=proxies)
+                return None
+
             except requests.exceptions.RequestException:
+                pass
+
         raise ConnectionError('The connection could not be established.')
 
     @staticmethod