diff --git a/conf/frpc.ini b/conf/frpc.ini
index 28f4e6d..9a1d8bc 100644
--- a/conf/frpc.ini
+++ b/conf/frpc.ini
@@ -6,6 +6,7 @@ server_port = 7000
 log_file = ./frpc.log
 # debug, info, warn, error
 log_level = info
+log_max_days = 3
 # for authentication
 auth_token = 123
 
diff --git a/conf/frps.ini b/conf/frps.ini
index 79bbbdf..91b0629 100644
--- a/conf/frps.ini
+++ b/conf/frps.ini
@@ -8,6 +8,7 @@ vhost_http_port = 80
 log_file = ./frps.log
 # debug, info, warn, error
 log_level = info
+log_max_days = 3
 
 # ssh is the proxy name, client will use this name and auth_token to connect to server
 [ssh]
diff --git a/src/frp/cmd/frpc/main.go b/src/frp/cmd/frpc/main.go
index 2f8a7f1..9fbab56 100644
--- a/src/frp/cmd/frpc/main.go
+++ b/src/frp/cmd/frpc/main.go
@@ -88,7 +88,7 @@ func main() {
 		client.ServerPort = serverPort
 	}
 
-	log.InitLog(client.LogWay, client.LogFile, client.LogLevel)
+	log.InitLog(client.LogWay, client.LogFile, client.LogLevel, client.LogMaxDays)
 
 	// wait until all control goroutine exit
 	var wait sync.WaitGroup
diff --git a/src/frp/cmd/frps/main.go b/src/frp/cmd/frps/main.go
index bd68f0c..a23f3fb 100644
--- a/src/frp/cmd/frps/main.go
+++ b/src/frp/cmd/frps/main.go
@@ -90,7 +90,7 @@ func main() {
 		server.BindPort = bindPort
 	}
 
-	log.InitLog(server.LogWay, server.LogFile, server.LogLevel)
+	log.InitLog(server.LogWay, server.LogFile, server.LogLevel, server.LogMaxDays)
 
 	l, err := conn.Listen(server.BindAddr, server.BindPort)
 	if err != nil {
@@ -98,6 +98,7 @@ func main() {
 		os.Exit(1)
 	}
 
+	// create vhost if VhostHttpPort != 0
 	if server.VhostHttpPort != 0 {
 		vhostListener, err := conn.Listen(server.BindAddr, server.VhostHttpPort)
 		if err != nil {
diff --git a/src/frp/models/client/config.go b/src/frp/models/client/config.go
index 466ff40..1d19c33 100644
--- a/src/frp/models/client/config.go
+++ b/src/frp/models/client/config.go
@@ -28,6 +28,7 @@ var (
 	LogFile           string = "console"
 	LogWay            string = "console"
 	LogLevel          string = "info"
+	LogMaxDays        int64  = 3
 	HeartBeatInterval int64  = 20
 	HeartBeatTimeout  int64  = 90
 )
@@ -69,6 +70,11 @@ func LoadConf(confFile string) (err error) {
 		LogLevel = tmpStr
 	}
 
+	tmpStr, ok = conf.Get("common", "log_max_days")
+	if ok {
+		LogMaxDays, _ = strconv.ParseInt(tmpStr, 10, 64)
+	}
+
 	var authToken string
 	tmpStr, ok = conf.Get("common", "auth_token")
 	if ok {
diff --git a/src/frp/models/server/config.go b/src/frp/models/server/config.go
index 8f04c21..28e096c 100644
--- a/src/frp/models/server/config.go
+++ b/src/frp/models/server/config.go
@@ -32,6 +32,7 @@ var (
 	LogFile          string = "console"
 	LogWay           string = "console" // console or file
 	LogLevel         string = "info"
+	LogMaxDays       int64  = 3
 	HeartBeatTimeout int64  = 90
 	UserConnTimeout  int64  = 10
 
@@ -82,6 +83,11 @@ func LoadConf(confFile string) (err error) {
 		LogLevel = tmpStr
 	}
 
+	tmpStr, ok = conf.Get("common", "log_max_days")
+	if ok {
+		LogMaxDays, _ = strconv.ParseInt(tmpStr, 10, 64)
+	}
+
 	// servers
 	for name, section := range conf {
 		if name != "common" {
diff --git a/src/frp/models/server/server.go b/src/frp/models/server/server.go
index a6338df..adcbaec 100644
--- a/src/frp/models/server/server.go
+++ b/src/frp/models/server/server.go
@@ -113,8 +113,8 @@ func (p *ProxyServer) Start() (err error) {
 				// set timeout
 				time.AfterFunc(time.Duration(UserConnTimeout)*time.Second, func() {
 					p.Lock()
-					defer p.Unlock()
 					element := p.userConnList.Front()
+					p.Unlock()
 					if element == nil {
 						return
 					}
diff --git a/src/frp/utils/log/log.go b/src/frp/utils/log/log.go
index ed66ca0..3e751a7 100644
--- a/src/frp/utils/log/log.go
+++ b/src/frp/utils/log/log.go
@@ -15,6 +15,7 @@
 package log
 
 import (
+	"fmt"
 	"github.com/astaxie/beego/logs"
 )
 
@@ -26,24 +27,24 @@ func init() {
 	Log.SetLogFuncCallDepth(Log.GetLogFuncCallDepth() + 1)
 }
 
-func InitLog(logWay string, logFile string, logLevel string) {
-	SetLogFile(logWay, logFile)
+func InitLog(logWay string, logFile string, logLevel string, maxdays int64) {
+	SetLogFile(logWay, logFile, maxdays)
 	SetLogLevel(logLevel)
 }
 
-// logWay: such as file or console
-func SetLogFile(logWay string, logFile string) {
+// logWay: file or console
+func SetLogFile(logWay string, logFile string, maxdays int64) {
 	if logWay == "console" {
 		Log.SetLogger("console", "")
 	} else {
-		Log.SetLogger("file", `{"filename": "`+logFile+`"}`)
+		params := fmt.Sprintf(`{"filename": "%s", "maxdays": %d}`, logFile, maxdays)
+		Log.SetLogger("file", params)
 	}
 }
 
 // value: error, warning, info, debug
 func SetLogLevel(logLevel string) {
 	level := 4 // warning
-
 	switch logLevel {
 	case "error":
 		level = 3
@@ -56,7 +57,6 @@ func SetLogLevel(logLevel string) {
 	default:
 		level = 4
 	}
-
 	Log.SetLevel(level)
 }