diff --git a/linux_ubuntu/prestage.yml b/linux_ubuntu/prestage.yml
index 68aacfb..5d71f2c 100644
--- a/linux_ubuntu/prestage.yml
+++ b/linux_ubuntu/prestage.yml
@@ -57,6 +57,8 @@
           proto: tcp
         - port: '3389'
           proto: tcp
+        - port: '69'
+          proto: udp
         - port: '5140'
           proto: tcp
         - port: '5141'