diff --git a/TODO b/TODO
index 67efc51..4e05c3d 100644
--- a/TODO
+++ b/TODO
@@ -10,3 +10,7 @@ STUFF TO DO:
 - Handle multiple concurrent users on one server
 
 - Better encoding (use all five bits in upstream data, a-z0-9)
+
+- Some kind of authentication?
+
+- Detect if EDNS0 can be used, probe MTU size