diff --git a/src/flutter_ffi.rs b/src/flutter_ffi.rs
index 827faf74e..d3665d7cc 100644
--- a/src/flutter_ffi.rs
+++ b/src/flutter_ffi.rs
@@ -64,6 +64,7 @@ fn initialize(app_dir: &str, custom_client_config: &str) {
     {
         use hbb_common::env_logger::*;
         init_from_env(Env::default().filter_or(DEFAULT_FILTER_ENV, "debug"));
+        crate::common::test_nat_type();
     }
     #[cfg(not(any(target_os = "android", target_os = "ios")))]
     {
diff --git a/src/rendezvous_mediator.rs b/src/rendezvous_mediator.rs
index 99e6c3b8f..09e3b4fb9 100644
--- a/src/rendezvous_mediator.rs
+++ b/src/rendezvous_mediator.rs
@@ -57,6 +57,7 @@ impl RendezvousMediator {
     }
 
     pub async fn start_all() {
+        crate::test_nat_type();
         if config::is_outgoing_only() {
             loop {
                 sleep(1.).await;
@@ -69,7 +70,6 @@ impl RendezvousMediator {
         }
         check_zombie();
         let server = new_server();
-        crate::test_nat_type();
         if config::option2bool("stop-service", &Config::get_option("stop-service")) {
             crate::test_rendezvous_server();
         }