diff --git a/Plugins/mongodb.go b/Plugins/mongodb.go
index 8484036..03aa443 100644
--- a/Plugins/mongodb.go
+++ b/Plugins/mongodb.go
@@ -28,15 +28,15 @@ func MongodbUnauth(info *common.HostInfo) (flag bool, err error) {
 		return flag, err
 	}
 	defer conn.Close()
+	err = conn.SetReadDeadline(time.Now().Add(time.Duration(info.Timeout)*time.Second))
+	if err != nil {
+		return flag, err
+	}
 	_, err = conn.Write(senddata)
 	if err != nil {
 		return flag, err
 	}
 	buf := make([]byte, 1024)
-	err = conn.SetReadDeadline(time.Now().Add(time.Duration(info.Timeout)*time.Second))
-	if err != nil {
-		return flag, err
-	}
 	count, err := conn.Read(buf)
 	if err != nil {
 		return flag, err
@@ -47,10 +47,6 @@ func MongodbUnauth(info *common.HostInfo) (flag bool, err error) {
 		if err != nil {
 			return flag, err
 		}
-		err = conn.SetReadDeadline(time.Now().Add(time.Duration(info.Timeout)*time.Second))
-		if err != nil {
-			return flag, err
-		}
 		count, err := conn.Read(buf)
 		if err != nil {
 			return flag, err