diff --git a/handler/tunnel/bind.go b/handler/tunnel/bind.go
index d0ac0a8..1099e07 100644
--- a/handler/tunnel/bind.go
+++ b/handler/tunnel/bind.go
@@ -54,15 +54,15 @@ func (h *tunnelHandler) handleBind(ctx context.Context, conn net.Conn, network,
 		return
 	}
 
-	h.pool.Add(tunnelID, NewConnector(connectorID, session))
+	h.pool.Add(tunnelID, NewConnector(connectorID, tunnelID, h.id, session, h.md.sd), h.md.tunnelTTL)
 	if h.md.ingress != nil {
 		h.md.ingress.Set(ctx, addr, tunnelID.String())
 	}
 	if h.md.sd != nil {
 		err := h.md.sd.Register(ctx, &sd.Service{
-			ID: connectorID.String(),
-			Name: tunnelID.String(),
-			Node: h.id,
+			ID:      connectorID.String(),
+			Name:    tunnelID.String(),
+			Node:    h.id,
 			Network: network,
 			Address: h.md.entryPoint,
 		})
diff --git a/handler/tunnel/dialer.go b/handler/tunnel/dialer.go
index b8e14b3..34d9e76 100644
--- a/handler/tunnel/dialer.go
+++ b/handler/tunnel/dialer.go
@@ -20,7 +20,9 @@ type Dialer struct {
 
 func (d *Dialer) Dial(ctx context.Context, network string, tid string) (conn net.Conn, node string, cid string, err error) {
 	retry := d.retry
-	retry = 1
+	if retry <= 0 {
+		retry = 1
+	}
 
 	for i := 0; i < retry; i++ {
 		c := d.pool.Get(network, tid)
diff --git a/handler/tunnel/metadata.go b/handler/tunnel/metadata.go
index 67d3040..62ca919 100644
--- a/handler/tunnel/metadata.go
+++ b/handler/tunnel/metadata.go
@@ -15,12 +15,17 @@ import (
 	"github.com/go-gost/x/registry"
 )
 
+const (
+	defaultTTL = 15 * time.Second
+)
+
 type metadata struct {
 	readTimeout             time.Duration
 	entryPoint              string
 	entryPointID            relay.TunnelID
 	entryPointProxyProtocol int
 	directTunnel            bool
+	tunnelTTL               time.Duration
 	ingress                 ingress.Ingress
 	sd                      sd.SD
 	muxCfg                  *mux.Config
@@ -29,6 +34,10 @@ type metadata struct {
 func (h *tunnelHandler) parseMetadata(md mdata.Metadata) (err error) {
 	h.md.readTimeout = mdutil.GetDuration(md, "readTimeout")
 
+	h.md.tunnelTTL = mdutil.GetDuration(md, "tunnel.ttl")
+	if h.md.tunnelTTL <= 0 {
+		h.md.tunnelTTL = defaultTTL
+	}
 	h.md.directTunnel = mdutil.GetBool(md, "tunnel.direct")
 	h.md.entryPoint = mdutil.GetString(md, "entrypoint")
 	h.md.entryPointID = parseTunnelID(mdutil.GetString(md, "entrypoint.id"))
diff --git a/handler/tunnel/tunnel.go b/handler/tunnel/tunnel.go
index e12d1fd..b71f6eb 100644
--- a/handler/tunnel/tunnel.go
+++ b/handler/tunnel/tunnel.go
@@ -14,16 +14,22 @@ import (
 )
 
 type Connector struct {
-	id relay.ConnectorID
-	t  time.Time
-	s  *mux.Session
+	id   relay.ConnectorID
+	tid  relay.TunnelID
+	node string
+	sd   sd.SD
+	t    time.Time
+	s    *mux.Session
 }
 
-func NewConnector(id relay.ConnectorID, s *mux.Session) *Connector {
+func NewConnector(id relay.ConnectorID, tid relay.TunnelID, node string, s *mux.Session, sd sd.SD) *Connector {
 	c := &Connector{
-		id: id,
-		t:  time.Now(),
-		s:  s,
+		id:   id,
+		tid:  tid,
+		node: node,
+		sd:   sd,
+		t:    time.Now(),
+		s:    s,
 	}
 	go c.accept()
 	return c
@@ -35,6 +41,13 @@ func (c *Connector) accept() {
 		if err != nil {
 			logger.Default().Errorf("connector %s: %v", c.id, err)
 			c.s.Close()
+			if c.sd != nil {
+				c.sd.Deregister(context.Background(), &sd.Service{
+					ID:   c.id.String(),
+					Name: c.tid.String(),
+					Node: c.node,
+				})
+			}
 			return
 		}
 		conn.Close()
@@ -58,14 +71,19 @@ type Tunnel struct {
 	close      chan struct{}
 	mu         sync.RWMutex
 	sd         sd.SD
+	ttl        time.Duration
 }
 
-func NewTunnel(node string, tid relay.TunnelID) *Tunnel {
+func NewTunnel(node string, tid relay.TunnelID, ttl time.Duration) *Tunnel {
 	t := &Tunnel{
 		node:  node,
 		id:    tid,
 		t:     time.Now(),
 		close: make(chan struct{}),
+		ttl:   ttl,
+	}
+	if t.ttl <= 0 {
+		t.ttl = defaultTTL
 	}
 	go t.clean()
 	return t
@@ -127,7 +145,7 @@ func (t *Tunnel) CloseOnIdle() bool {
 }
 
 func (t *Tunnel) clean() {
-	ticker := time.NewTicker(1 * time.Minute)
+	ticker := time.NewTicker(t.ttl)
 	defer ticker.Stop()
 
 	for {
@@ -188,7 +206,7 @@ func NewConnectorPool(node string, sd sd.SD) *ConnectorPool {
 	return p
 }
 
-func (p *ConnectorPool) Add(tid relay.TunnelID, c *Connector) {
+func (p *ConnectorPool) Add(tid relay.TunnelID, c *Connector, ttl time.Duration) {
 	p.mu.Lock()
 	defer p.mu.Unlock()
 
@@ -196,7 +214,7 @@ func (p *ConnectorPool) Add(tid relay.TunnelID, c *Connector) {
 
 	t := p.tunnels[s]
 	if t == nil {
-		t = NewTunnel(p.node, tid)
+		t = NewTunnel(p.node, tid, ttl)
 		t.WithSD(p.sd)
 
 		p.tunnels[s] = t
diff --git a/sd/plugin.go b/sd/plugin.go
index 7795c4d..e41b16b 100644
--- a/sd/plugin.go
+++ b/sd/plugin.go
@@ -146,7 +146,7 @@ type sdService struct {
 }
 
 type httpGetResponse struct {
-	Services []*sdService
+	Services []*sdService `json:"services"`
 }
 
 type httpPlugin struct {
@@ -327,8 +327,9 @@ func (p *httpPlugin) Get(ctx context.Context, name string) (services []*sd.Servi
 			continue
 		}
 		services = append(services, &sd.Service{
-			Node:    v.Node,
+			ID:      v.ID,
 			Name:    v.Name,
+			Node:    v.Node,
 			Network: v.Network,
 			Address: v.Address,
 		})