diff --git a/plugins/op_waf/waf/lua/init.lua b/plugins/op_waf/waf/lua/init.lua
index c9c3528b0..d1e3337e4 100644
--- a/plugins/op_waf/waf/lua/init.lua
+++ b/plugins/op_waf/waf/lua/init.lua
@@ -551,7 +551,7 @@ end
 
 
 function waf()
-    -- if server_name == "unset" then ngx.exit(403) end
+    if server_name == "unset" then ngx.exit(403) end
     min_route()
     -- C:D("min_route")