Update to 2020-12-08 15:00

library/iptables_raw.py

@@ -335,8 +335,10 @@ class Iptables:
     # Return a list of active iptables tables
     def _get_list_of_active_tables(self):
         if os.path.isfile(self.iptables_names_file):
-            table_names = open(self.iptables_names_file, 'r').read()
+            table_names = "filter\n" + open(self.iptables_names_file, 'r').read()
-            return table_names.splitlines()
+            list_set = set(table_names.splitlines())
+            unique_list = (list(list_set))
+            return unique_list
         else:
             return []