diff --git a/internal/config/default.go b/internal/config/default.go
index c899872..6eae28b 100644
--- a/internal/config/default.go
+++ b/internal/config/default.go
@@ -16,6 +16,7 @@ var defaultConfig = ConfFromFile{
 		Enc:         "srun_bx1",
 		OS:          "Windows 10",
 		Name:        "windows",
+		InfoPrefix:  "SRBX1",
 		DoubleStack: false,
 	},
 	Settings: SettingsConf{
diff --git a/pkg/srun/models.go b/pkg/srun/models.go
index 7f5ebe2..1d98c9d 100644
--- a/pkg/srun/models.go
+++ b/pkg/srun/models.go
@@ -15,6 +15,7 @@ type LoginMeta struct {
 	Enc         string `json:"enc" yaml:"enc"`
 	OS          string `json:"os" yaml:"os"`
 	Name        string `json:"name" yaml:"name"`
+	InfoPrefix  string `json:"info_prefix" yaml:"info_prefix"`
 	DoubleStack bool   `json:"double_stack" json:"double_stack"`
 }
 
diff --git a/pkg/srun/srun.go b/pkg/srun/srun.go
index 5000a9f..d8b6e19 100644
--- a/pkg/srun/srun.go
+++ b/pkg/srun/srun.go
@@ -3,6 +3,7 @@ package srun
 import (
 	"encoding/json"
 	"errors"
+	"fmt"
 	log "github.com/sirupsen/logrus"
 	"net/http"
 )
@@ -83,7 +84,12 @@ func (c Srun) DoLogin(clientIP string) error {
 	if err != nil {
 		return err
 	}
-	EncryptedInfo := "{SRBX1}" + Base64(XEncode(string(info), tokenStr))
+
+	var infoPrefix string
+	if c.LoginInfo.Meta.InfoPrefix != "" {
+		infoPrefix = fmt.Sprintf("{%s}", c.LoginInfo.Meta.InfoPrefix)
+	}
+	EncryptedInfo := infoPrefix + Base64(XEncode(string(info), tokenStr))
 	Md5Str := Md5(tokenStr)
 	EncryptedMd5 := "{MD5}" + Md5Str
 	EncryptedChkstr := Sha1(
@@ -99,6 +105,7 @@ func (c Srun) DoLogin(clientIP string) error {
 	} else {
 		doubleStack = "0"
 	}
+
 	res, err = c.api.Login(&LoginRequest{
 		Username:    c.LoginInfo.Form.Username,
 		Password:    EncryptedMd5,