diff --git a/device.go b/device.go
index 359edea..bed8d00 100644
--- a/device.go
+++ b/device.go
@@ -104,7 +104,7 @@ func (cli *RPCClient) run() {
 		// 	log.Println(err)
 		// }
 
-		log.Printf("send to target bytes: %d", len(buf.Bytes()))
+		log.Printf("send to target %s bytes: %d", waterutil.IPv4Destination(buf.Bytes()), len(buf.Bytes()))
 		// 发到对面的网卡
 		err = stream.Send(&gen.Request{
 			Frames: buf.Bytes(),