fix mac returned instead of ip
diff --git a/xos/services/cord/models.py b/xos/services/cord/models.py
index 22bc391..0da4809 100644
--- a/xos/services/cord/models.py
+++ b/xos/services/cord/models.py
@@ -602,7 +602,7 @@
     @property
     def wan_container_mac(self):
         if self.vrouter:
-            return self.vrouter.public_ip
+            return self.vrouter.public_mac
         else:
             if (CORD_USE_VTN):
                 # Should this be an error?