diff --git a/proxy/proxy.go b/proxy/proxy.go
index 5fbccb97..27cafc7b 100644
--- a/proxy/proxy.go
+++ b/proxy/proxy.go
@@ -32,6 +32,13 @@ func SetDialer(d Dialer) {
 	_defaultDialer = d
 }
 
+// Dial uses default Dialer to dial TCP.
+func Dial(metadata *M.Metadata) (net.Conn, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), tcpConnectTimeout)
+	defer cancel()
+	return _defaultDialer.DialContext(ctx, metadata)
+}
+
 // DialContext uses default Dialer to dial TCP with context.
 func DialContext(ctx context.Context, metadata *M.Metadata) (net.Conn, error) {
 	return _defaultDialer.DialContext(ctx, metadata)