diff --git a/config/config.go b/config/config.go
index 3a87e99..12e68c3 100644
--- a/config/config.go
+++ b/config/config.go
@@ -6,7 +6,6 @@ import (
 	"github.com/OpenIoTHub/utils/models"
 	"gopkg.in/yaml.v2"
 	"io"
-	"io/ioutil"
 	"log"
 	"os"
 	"path/filepath"
@@ -32,7 +31,8 @@ func LoadConfig() (err error) {
 		writers = append(writers, os.Stdout)
 	}
 	if ConfigMode.LogConfig != nil && ConfigMode.LogConfig.LogFilePath != "" {
-		f, err := os.OpenFile(ConfigMode.LogConfig.LogFilePath, os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0644)
+		var f *os.File
+		f, err = os.OpenFile(ConfigMode.LogConfig.LogFilePath, os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0644)
 		if err != nil {
 			log.Fatal(err)
 		}
@@ -111,6 +111,6 @@ func writeConfigFile(configMode models.ServerConfig, path string) (err error) {
 	if err != nil {
 		return
 	}
-	err = ioutil.WriteFile(path, configByte, 0644)
+	err = os.WriteFile(path, configByte, 0644)
 	return
 }
diff --git a/manager/grpc.go b/manager/grpc.go
index 53220a9..53d5a04 100644
--- a/manager/grpc.go
+++ b/manager/grpc.go
@@ -18,7 +18,13 @@ import (
 // grpc
 func (sm *SessionsManager) StartgRpcListenAndServ() {
 	go func() {
-		s := grpc.NewServer(grpc.Creds(credentials.NewTLS(autocertManager.TLSConfig())))
+		//TODO 如果是IP则使用不安全的连接，如果是域名则使用安全的连接
+		var s *grpc.Server
+		if net.ParseIP(config.ConfigMode.PublicIp) == nil {
+			s = grpc.NewServer(grpc.Creds(credentials.NewTLS(autocertManager.TLSConfig())))
+		} else {
+			s = grpc.NewServer()
+		}
 		pb.RegisterHttpManagerServer(s, sm)
 		lis, err := net.Listen("tcp", fmt.Sprintf(":%d", config.ConfigMode.Common.GrpcPort))
 		if err != nil {