diff --git a/controllers/login.go b/controllers/login.go
index db68a45..e3e3006 100644
--- a/controllers/login.go
+++ b/controllers/login.go
@@ -35,6 +35,8 @@ func Login(localAddr net.Addr, debugOutput bool) error {
 
 	if localAddr != nil && global.Config.Settings.Basic.UseDhcpIP {
 		ip = localAddr.(*net.TCPAddr).IP.String()
+	} else if global.Flags.ClientIP != "" {
+		ip = global.Flags.ClientIP
 	}
 
 	log.Debugln("认证客户端 ip: ", ip)
diff --git a/global/flags.go b/global/flags.go
index 9880692..3700336 100644
--- a/global/flags.go
+++ b/global/flags.go
@@ -11,10 +11,13 @@ var Flags struct {
 	RunningDaemon bool
 	//强制daemon
 	Daemon bool
+	//指定 client ip
+	ClientIP string
 }
 
 func initFlags() {
 	flag.StringVar(&Flags.Path, "config", "Config.yaml", "config path")
+	flag.StringVar(&Flags.ClientIP, "ip", "", "client ip for login")
 	flag.BoolVar(&Flags.RunningDaemon, "running-daemon", false, "")
 	flag.BoolVar(&Flags.Daemon, "daemon", false, "")
 	flag.Parse()