diff --git a/stats/connections.go b/stats/connections.go
index d25f08c..818b98e 100755
--- a/stats/connections.go
+++ b/stats/connections.go
@@ -7,7 +7,7 @@ import (
 	"strconv"
 	"time"
 
-	"github.com/xjasonlyu/tun2socks/tunnel"
+	"github.com/xjasonlyu/tun2socks/tunnel/statistic"
 
 	"github.com/go-chi/chi"
 	"github.com/go-chi/render"
@@ -26,7 +26,7 @@ func connectionRouter() http.Handler {
 
 func getConnections(w http.ResponseWriter, r *http.Request) {
 	if !websocket.IsWebSocketUpgrade(r) {
-		snapshot := tunnel.DefaultManager.Snapshot()
+		snapshot := statistic.DefaultManager.Snapshot()
 		render.JSON(w, r, snapshot)
 		return
 	}
@@ -52,7 +52,7 @@ func getConnections(w http.ResponseWriter, r *http.Request) {
 	buf := &bytes.Buffer{}
 	sendSnapshot := func() error {
 		buf.Reset()
-		snapshot := tunnel.DefaultManager.Snapshot()
+		snapshot := statistic.DefaultManager.Snapshot()
 		if err := json.NewEncoder(buf).Encode(snapshot); err != nil {
 			return err
 		}
@@ -75,7 +75,7 @@ func getConnections(w http.ResponseWriter, r *http.Request) {
 
 func closeConnection(w http.ResponseWriter, r *http.Request) {
 	id := chi.URLParam(r, "id")
-	snapshot := tunnel.DefaultManager.Snapshot()
+	snapshot := statistic.DefaultManager.Snapshot()
 	for _, c := range snapshot.Connections {
 		if id == c.ID() {
 			_ = c.Close()
@@ -86,7 +86,7 @@ func closeConnection(w http.ResponseWriter, r *http.Request) {
 }
 
 func closeAllConnections(w http.ResponseWriter, r *http.Request) {
-	snapshot := tunnel.DefaultManager.Snapshot()
+	snapshot := statistic.DefaultManager.Snapshot()
 	for _, c := range snapshot.Connections {
 		_ = c.Close()
 	}
diff --git a/stats/server.go b/stats/server.go
index 5396364..e0648ad 100755
--- a/stats/server.go
+++ b/stats/server.go
@@ -10,7 +10,7 @@ import (
 
 	"github.com/xjasonlyu/tun2socks/constant"
 	"github.com/xjasonlyu/tun2socks/log"
-	"github.com/xjasonlyu/tun2socks/tunnel"
+	"github.com/xjasonlyu/tun2socks/tunnel/statistic"
 
 	"github.com/go-chi/chi"
 	"github.com/go-chi/cors"
@@ -176,7 +176,7 @@ func traffic(w http.ResponseWriter, r *http.Request) {
 
 	tick := time.NewTicker(time.Second)
 	defer tick.Stop()
-	t := tunnel.DefaultManager
+	t := statistic.DefaultManager
 	buf := &bytes.Buffer{}
 	var err error
 	for range tick.C {
diff --git a/tunnel/manager.go b/tunnel/manager.go
deleted file mode 100755
index 261e685..0000000
--- a/tunnel/manager.go
+++ /dev/null
@@ -1,22 +0,0 @@
-package tunnel
-
-import (
-	"net"
-
-	"github.com/xjasonlyu/tun2socks/common/adapter"
-	"github.com/xjasonlyu/tun2socks/component/manager"
-)
-
-var (
-	// DefaultManager is the default traffic and connections
-	// manager used by tunnel.
-	DefaultManager = manager.New()
-)
-
-func newTCPTracker(conn net.Conn, metadata *adapter.Metadata) net.Conn {
-	return manager.NewTCPTracker(conn, metadata, DefaultManager)
-}
-
-func newUDPTracker(conn net.PacketConn, metadata *adapter.Metadata) net.PacketConn {
-	return manager.NewUDPTracker(conn, metadata, DefaultManager)
-}
diff --git a/component/manager/manager.go b/tunnel/statistic/manager.go
similarity index 92%
rename from component/manager/manager.go
rename to tunnel/statistic/manager.go
index 9a0d54f..df85b50 100755
--- a/component/manager/manager.go
+++ b/tunnel/statistic/manager.go
@@ -1,5 +1,4 @@
-// Package manager provides statistic management of connections.
-package manager
+package statistic
 
 import (
 	"sync"
@@ -8,6 +7,21 @@ import (
 	"go.uber.org/atomic"
 )
 
+var DefaultManager *Manager
+
+func init() {
+	DefaultManager = &Manager{
+		uploadTemp:    atomic.NewInt64(0),
+		downloadTemp:  atomic.NewInt64(0),
+		uploadBlip:    atomic.NewInt64(0),
+		downloadBlip:  atomic.NewInt64(0),
+		uploadTotal:   atomic.NewInt64(0),
+		downloadTotal: atomic.NewInt64(0),
+	}
+
+	go DefaultManager.handle()
+}
+
 type Manager struct {
 	connections   sync.Map
 	uploadTemp    *atomic.Int64
@@ -18,20 +32,6 @@ type Manager struct {
 	downloadTotal *atomic.Int64
 }
 
-func New() *Manager {
-	manager := &Manager{
-		uploadTemp:    atomic.NewInt64(0),
-		downloadTemp:  atomic.NewInt64(0),
-		uploadBlip:    atomic.NewInt64(0),
-		downloadBlip:  atomic.NewInt64(0),
-		uploadTotal:   atomic.NewInt64(0),
-		downloadTotal: atomic.NewInt64(0),
-	}
-	go manager.handle()
-
-	return manager
-}
-
 func (m *Manager) Join(c tracker) {
 	m.connections.Store(c.ID(), c)
 }
diff --git a/component/manager/tracker.go b/tunnel/statistic/tracker.go
similarity index 99%
rename from component/manager/tracker.go
rename to tunnel/statistic/tracker.go
index c35e58a..5315993 100755
--- a/component/manager/tracker.go
+++ b/tunnel/statistic/tracker.go
@@ -1,4 +1,4 @@
-package manager
+package statistic
 
 import (
 	"net"
diff --git a/tunnel/tcp.go b/tunnel/tcp.go
index 51ebb28..5d8f04b 100755
--- a/tunnel/tcp.go
+++ b/tunnel/tcp.go
@@ -11,12 +11,17 @@ import (
 	"github.com/xjasonlyu/tun2socks/common/pool"
 	"github.com/xjasonlyu/tun2socks/log"
 	"github.com/xjasonlyu/tun2socks/proxy"
+	"github.com/xjasonlyu/tun2socks/tunnel/statistic"
 )
 
 const (
 	tcpWaitTimeout = 5 * time.Second
 )
 
+func newTCPTracker(conn net.Conn, metadata *adapter.Metadata) net.Conn {
+	return statistic.NewTCPTracker(conn, metadata, statistic.DefaultManager)
+}
+
 func handleTCP(localConn adapter.TCPConn) {
 	defer localConn.Close()
 
diff --git a/tunnel/udp.go b/tunnel/udp.go
index 875ebf7..01d99a0 100755
--- a/tunnel/udp.go
+++ b/tunnel/udp.go
@@ -12,6 +12,7 @@ import (
 	"github.com/xjasonlyu/tun2socks/component/nat"
 	"github.com/xjasonlyu/tun2socks/log"
 	"github.com/xjasonlyu/tun2socks/proxy"
+	"github.com/xjasonlyu/tun2socks/tunnel/statistic"
 )
 
 const (
@@ -24,6 +25,10 @@ var (
 	natTable = nat.NewTable()
 )
 
+func newUDPTracker(conn net.PacketConn, metadata *adapter.Metadata) net.PacketConn {
+	return statistic.NewUDPTracker(conn, metadata, statistic.DefaultManager)
+}
+
 func handleUDP(packet adapter.UDPPacket) {
 	metadata := packet.Metadata()
 	if !metadata.Valid() {