diff --git a/engine/stun.go b/engine/stun.go
index c66dd75..d6074db 100644
--- a/engine/stun.go
+++ b/engine/stun.go
@@ -1,8 +1,10 @@
 package engine
 
 import (
+	"fmt"
 	"net/url"
 	"polaris/ent/downloadclients"
+	"polaris/log"
 	"polaris/pkg/nat"
 	"polaris/pkg/qbittorrent"
 
@@ -10,31 +12,33 @@ import (
 )
 
 func (s *Engine) stunProxyDownloadClient() error {
-	downloader, e, err := s.GetDownloadClient()
-	if err != nil {
-		return err
-	}
-	if !e.UseNatTraversal {
-		return nil
-	}
-	if e.Implementation != downloadclients.ImplementationQbittorrent {
-		return nil
-	}
-	d, ok := downloader.(*qbittorrent.Client)
-	if !ok {
-		return nil
-	}
-	u, err := url.Parse(d.URL)
-	if err != nil {
-		return err
-	}
+	downloaders := s.db.GetAllDonloadClients()
+	for _, d := range downloaders {
+		if !d.Enable {
+			continue
+		}
+
+		if d.Implementation != downloadclients.ImplementationQbittorrent { //TODO only support qbittorrent for now
+			continue
+		}
+
+		qbt, err := qbittorrent.NewClient(d.URL, d.User, d.Password)
+		if err != nil {
+			return fmt.Errorf("connect to download client error: %v", d.URL)
+		}
+		u, err := url.Parse(d.URL)
+		if err != nil {
+			return err
+		}
+		log.Infof("start stun proxy for %s", d.Name)
+		n, err := nat.NewNatTraversal(func(xa stun.XORMappedAddress) error {
+			return qbt.SetListenPort(xa.Port)
+		}, u.Hostname())
+		if err != nil {
+			return err
+		}
+		n.StartProxy()
 
-	n, err := nat.NewNatTraversal(func(xa stun.XORMappedAddress) error {
-		return d.SetListenPort(xa.Port)
-	}, u.Hostname())
-	if err != nil {
-		return err
 	}
-	n.StartProxy()
 	return nil
 }
diff --git a/ui/lib/providers/settings.dart b/ui/lib/providers/settings.dart
index cb13318..0033579 100644
--- a/ui/lib/providers/settings.dart
+++ b/ui/lib/providers/settings.dart
@@ -251,6 +251,7 @@ class DownloadClient {
   bool? removeCompletedDownloads;
   bool? removeFailedDownloads;
   int? priority;
+  bool useNatTraversal = false;
   DownloadClient(
       {this.id,
       this.enable,
@@ -261,7 +262,7 @@ class DownloadClient {
       this.password,
       this.removeCompletedDownloads = true,
       this.priority = 1,
-      this.removeFailedDownloads = true});
+      this.removeFailedDownloads = true, this.useNatTraversal = false});
 
   DownloadClient.fromJson(Map<String, dynamic> json) {
     id = json['id'];
@@ -274,6 +275,7 @@ class DownloadClient {
     priority = json["priority1"];
     removeCompletedDownloads = json["remove_completed_downloads"] ?? false;
     removeFailedDownloads = json["remove_failed_downloads"] ?? false;
+    useNatTraversal = json["use_nat_traversal"]?? false;
   }
 
   Map<String, dynamic> toJson() {
@@ -288,6 +290,7 @@ class DownloadClient {
     data["priority"] = priority;
     data["remove_completed_downloads"] = removeCompletedDownloads;
     data["remove_failed_downloads"] = removeFailedDownloads;
+    data["use_nat_traversal"] = useNatTraversal;
     return data;
   }
 
diff --git a/ui/lib/settings/downloader.dart b/ui/lib/settings/downloader.dart
index 01de8b4..061c3bb 100644
--- a/ui/lib/settings/downloader.dart
+++ b/ui/lib/settings/downloader.dart
@@ -63,6 +63,7 @@ class _DownloaderState extends ConsumerState<DownloaderSettings> {
             "remove_completed_downloads": client.removeCompletedDownloads,
             "remove_failed_downloads": client.removeFailedDownloads,
             "priority": client.priority.toString(),
+            "use_nat_traversal": client.useNatTraversal,
           },
           child: Column(
             children: [
@@ -86,6 +87,12 @@ class _DownloaderState extends ConsumerState<DownloaderSettings> {
                       labelText: "优先级", helperText: "1-50, 1最高优先级，50最低优先级"),
                   validator: FormBuilderValidators.integer(),
                   autovalidateMode: AutovalidateMode.onUserInteraction),
+              FormBuilderSwitch(
+                  name: "use_nat_traversal",
+                  enabled: client.implementation == "qbittorrent",
+                  title: const Text("使用内置STUN NAT穿透"),
+                  decoration: InputDecoration(helperText: "内建的NAT穿透功能帮助BT客户端上传(会自动更改下载器的监听地址)"),
+                  ),
               FormBuilderSwitch(
                   name: "remove_completed_downloads",
                   title: const Text("任务完成后删除")),
@@ -150,6 +157,7 @@ class _DownloaderState extends ConsumerState<DownloaderSettings> {
                 user: _enableAuth ? values["user"] : null,
                 password: _enableAuth ? values["password"] : null,
                 priority: int.parse(values["priority"]),
+                useNatTraversal: values["use_nat_traversal"],
                 removeCompletedDownloads: values["remove_completed_downloads"],
                 removeFailedDownloads: values["remove_failed_downloads"]));
       } else {
@@ -165,7 +173,12 @@ class _DownloaderState extends ConsumerState<DownloaderSettings> {
     }
 
     return showSettingDialog(
-        context, title, client.idExists() && client.implementation != "buildin", body, onSubmit, onDelete);
+        context,
+        title,
+        client.idExists() && client.implementation != "buildin",
+        body,
+        onSubmit,
+        onDelete);
   }
 
   Future<void> showSelections() {