diff --git a/.gitignore b/.gitignore
index 7070c8ad..6f0e07ca 100644
--- a/.gitignore
+++ b/.gitignore
@@ -58,3 +58,4 @@ _test
 tmp/
 main
 Makefile
+src/modules/monapi/plugins/snmp/
diff --git a/go.mod b/go.mod
index 902561ba..db141310 100644
--- a/go.mod
+++ b/go.mod
@@ -20,6 +20,8 @@ require (
 	github.com/hpcloud/tail v1.0.0
 	github.com/influxdata/influxdb v1.8.0
 	github.com/influxdata/telegraf v1.16.2
+	github.com/influxdata/toml v0.0.0-20190415235208-270119a8ce65
+	github.com/influxdata/wlog v0.0.0-20160411224016-7c63b0a71ef8
 	github.com/m3db/m3 v0.15.17
 	github.com/mattn/go-isatty v0.0.12
 	github.com/mattn/go-sqlite3 v1.14.0 // indirect
@@ -31,6 +33,7 @@ require (
 	github.com/prometheus/common v0.9.1
 	github.com/robfig/go-cache v0.0.0-20130306151617-9fc39e0dbf62 // indirect
 	github.com/shirou/gopsutil v3.20.11+incompatible // indirect
+	github.com/soniah/gosnmp v1.25.0
 	github.com/spaolacci/murmur3 v1.1.0
 	github.com/spf13/viper v1.7.1
 	github.com/streadway/amqp v1.0.0
diff --git a/go.sum b/go.sum
index 272a4fde..af4d53f8 100644
--- a/go.sum
+++ b/go.sum
@@ -550,8 +550,10 @@ github.com/influxdata/tail v1.0.1-0.20200707181643-03a791b270e4/go.mod h1:VeiWgI
 github.com/influxdata/tdigest v0.0.0-20181121200506-bf2b5ad3c0a9/go.mod h1:Js0mqiSBE6Ffsg94weZZ2c+v/ciT8QRHFOap7EKDrR0=
 github.com/influxdata/telegraf v1.16.2 h1:G988b0+CL2IVDft9V2ZUteKgnbp+eI7vtQ0liPhQKxw=
 github.com/influxdata/telegraf v1.16.2/go.mod h1:LZ/6hlf60cwqGr8phfbRKf8x1HoAoqxoMpTp/iqcNXk=
+github.com/influxdata/toml v0.0.0-20190415235208-270119a8ce65 h1:vvyMtD5LTJc1W9sQKjDkAWdcg0478CszSdzlHtiAXCY=
 github.com/influxdata/toml v0.0.0-20190415235208-270119a8ce65/go.mod h1:zApaNFpP/bTpQItGZNNUMISDMDAnTXu9UqJ4yT3ocz8=
 github.com/influxdata/usage-client v0.0.0-20160829180054-6d3895376368/go.mod h1:Wbbw6tYNvwa5dlB6304Sd+82Z3f7PmVZHVKU637d4po=
+github.com/influxdata/wlog v0.0.0-20160411224016-7c63b0a71ef8 h1:W2IgzRCb0L9VzMujq/QuTaZUKcH8096jWwP519mHN6Q=
 github.com/influxdata/wlog v0.0.0-20160411224016-7c63b0a71ef8/go.mod h1:/2NMgWB1DHM1ti/gqhOlg+LJeBVk6FqR5aVGYY0hlwI=
 github.com/jackc/fake v0.0.0-20150926172116-812a484cc733/go.mod h1:WrMFNQdiFJ80sQsxDoMokWK1W5TQtxBFNpzWTD84ibQ=
 github.com/jackc/pgx v3.6.0+incompatible/go.mod h1:0ZGrqGqkRlliWnWB4zKnWtjbSWbGkVEFm4TeybAXq+I=
@@ -740,6 +742,7 @@ github.com/munnerz/goautoneg v0.0.0-20120707110453-a547fc61f48d/go.mod h1:+n7T8m
 github.com/mwitkow/go-conntrack v0.0.0-20161129095857-cc309e4a2223/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
 github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
 github.com/mxk/go-flowrate v0.0.0-20140419014527-cca7078d478f/go.mod h1:ZdcZmHo+o7JKHSa8/e818NopupXU1YMK5fe1lsApnBw=
+github.com/naoina/go-stringutil v0.1.0 h1:rCUeRUHjBjGTSHl0VC00jUPLz8/F9dDzYI70Hzifhks=
 github.com/naoina/go-stringutil v0.1.0/go.mod h1:XJ2SJL9jCtBh+P9q5btrd/Ylo8XwT/h1USek5+NqSA0=
 github.com/nats-io/jwt v0.3.0/go.mod h1:fRYCDE99xlTsqUzISS1Bi75UBJ6ljOJQOAAu5VglpSg=
 github.com/nats-io/jwt v0.3.2/go.mod h1:/euKqTS1ZD+zzjYrY7pseZrTtWQSjujC7xjPc8wL6eU=
@@ -918,6 +921,7 @@ github.com/smartystreets/goconvey v1.6.4/go.mod h1:syvi0/a8iFYH4r/RixwvyeAJjdLS9
 github.com/smartystreets/gunit v1.0.0/go.mod h1:qwPWnhz6pn0NnRBP++URONOVyNkPyr4SauJk4cUOwJs=
 github.com/soheilhy/cmux v0.1.4 h1:0HKaf1o97UwFjHH9o5XsHUOF+tqmdA7KEzXLpiyaw0E=
 github.com/soheilhy/cmux v0.1.4/go.mod h1:IM3LyeVVIOuxMH7sFAkER9+bJ4dT7Ms6E4xg4kGIyLM=
+github.com/soniah/gosnmp v1.25.0 h1:0y8vpjD07NPmnT+wojnUrKkYLX9Fxw1jI4cGTumWugQ=
 github.com/soniah/gosnmp v1.25.0/go.mod h1:8YvfZxH388NIIw2A+X5z2Oh97VcNhtmxDLt5QeUzVuQ=
 github.com/sony/gobreaker v0.4.1/go.mod h1:ZKptC7FHNvhBz7dN2LGjPVBz2sZJmc0/PkyDJOjmxWY=
 github.com/spaolacci/murmur3 v0.0.0-20180118202830-f09979ecbc72/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=
diff --git a/src/models/session.go b/src/models/session.go
index e3972e6d..a896cd84 100644
--- a/src/models/session.go
+++ b/src/models/session.go
@@ -58,6 +58,11 @@ func SessionCleanupByCreatedAt(ts int64) error {
 	logger.Debugf("delete before created_at %d session %d", ts, n)
 	return err
 }
+func SessionCleanupByUpdatedAt(ts int64) error {
+	n, err := DB["rdb"].Where("updated_at<?", ts).Delete(new(Session))
+	logger.Debugf("delete before updated_at %d session %d", ts, n)
+	return err
+}
 func (s *Session) Update(cols ...string) error {
 	_, err := DB["rdb"].Where("id=?", s.Sid).Cols(cols...).Update(s)
 	return err
@@ -115,3 +120,46 @@ func SessionGetUserWithCache(sid string) (*User, error) {
 	return UserMustGet("username=?", s.Username)
 
 }
+
+func SessionTotal(where string, args ...interface{}) (int64, error) {
+	session := DB["rdb"].NewSession()
+	defer session.Close()
+
+	if where != "" {
+		session = session.Where(where, args...)
+	}
+
+	return session.Count(new(Session))
+}
+
+func SessionGets(limit, offset int, where string, args ...interface{}) ([]Session, error) {
+	session := DB["rdb"].Limit(limit, offset).Desc("updated_at")
+
+	if where != "" {
+		session = session.Where(where, args...)
+	}
+
+	var sessions []Session
+	err := session.Find(&sessions)
+	return sessions, err
+}
+
+func SessionAndTotalGets(query string, limit, offset int) ([]Session, int64, error) {
+	where := "username != ''"
+	param := []interface{}{}
+
+	if query != "" {
+		q := "%" + query + "%"
+		where += " and (username like ? or remote_addr like ?)"
+		param = append(param, q, q)
+	}
+
+	total, err := SessionTotal(where, param...)
+	if err != nil {
+		return []Session{}, total, err
+	}
+
+	list, err := SessionGets(limit, offset, where, param...)
+
+	return list, total, err
+}
diff --git a/src/modules/rdb/auth/authenticator.go b/src/modules/rdb/auth/authenticator.go
index 2c56b008..fd79b891 100644
--- a/src/modules/rdb/auth/authenticator.go
+++ b/src/modules/rdb/auth/authenticator.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
+	"math"
 	"net/url"
 	"time"
 
@@ -425,7 +426,7 @@ func lockedUserAccess(cf *models.AuthConfig, user *models.User, loginErr error)
 		user.UpdatedAt = now
 		return nil
 	}
-	return _e("User is locked")
+	return _e("User is locked, unlock at %dm later", math.Ceil(float64(user.LockedAt+cf.LockTime-now))/60.0)
 }
 
 func frozenUserAccess(cf *models.AuthConfig, user *models.User, loginErr error) error {
diff --git a/src/modules/rdb/config/i18n.go b/src/modules/rdb/config/i18n.go
index 9f05e8c4..8d491361 100644
--- a/src/modules/rdb/config/i18n.go
+++ b/src/modules/rdb/config/i18n.go
@@ -102,11 +102,11 @@ var (
 			"The limited sessions %d":                                      "会话数量限制，最多%d个会话",
 			"Password has been expired":                                    "密码已过期，请重置密码",
 			"User is inactive":                                             "用户已禁用",
-			"User is locked":                                               "用户已锁定",
+			"User is locked, unlock at %dm later":                          "用户已锁定, %d分钟后解锁",
 			"User is frozen":                                               "用户已休眠",
 			"User is writen off":                                           "用户已注销",
-			"Minimum password length %d":                                   "密码最小长度 %d",
-			"Password too short (min:%d)":                                  "密码太短 (最小 %d)",
+			"Minimum password length %d":                                   "密码最小长度%d位",
+			"Password too short (min:%d)":                                  "密码太短(最小%d位)",
 			"%s format error":                                              "%s 所填内容不符合规范",
 			"%s %s format error":                                           "%s %s 所填内容不符合规范",
 			"username too long (max:%d)":                                   "用户名太长 (最长:%d)",
diff --git a/src/modules/rdb/http/router.go b/src/modules/rdb/http/router.go
index 2e77ca94..971912f0 100644
--- a/src/modules/rdb/http/router.go
+++ b/src/modules/rdb/http/router.go
@@ -205,6 +205,7 @@ func Config(r *gin.Engine) {
 		// session
 		v1.GET("/sessions/:sid", v1SessionGet)
 		v1.GET("/sessions/:sid/user", v1SessionGetUser)
+		v1.GET("/sessions", v1SessionListGet)
 		v1.DELETE("/sessions/:sid", v1SessionDelete)
 
 		// token
diff --git a/src/modules/rdb/http/router_auth.go b/src/modules/rdb/http/router_auth.go
index 0e911207..7b0fee82 100644
--- a/src/modules/rdb/http/router_auth.go
+++ b/src/modules/rdb/http/router_auth.go
@@ -689,6 +689,18 @@ func v1SessionGetUser(c *gin.Context) {
 	renderData(c, user, err)
 }
 
+func v1SessionListGet(c *gin.Context) {
+	limit := queryInt(c, "limit", 20)
+	query := queryStr(c, "query", "")
+
+	list, total, err := models.SessionAndTotalGets(query, limit, offset(c, limit))
+
+	renderData(c, gin.H{
+		"list":  list,
+		"total": total,
+	}, err)
+}
+
 func v1SessionDelete(c *gin.Context) {
 	sid := urlParamStr(c, "sid")
 	logger.Debugf("session del sid %s", sid)
diff --git a/src/modules/rdb/session/session_db.go b/src/modules/rdb/session/session_db.go
index 3714edbe..db467308 100644
--- a/src/modules/rdb/session/session_db.go
+++ b/src/modules/rdb/session/session_db.go
@@ -29,7 +29,7 @@ func newDbStorage(cf *config.SessionSection, opts *options) (storage, error) {
 			case <-opts.ctx.Done():
 				return
 			case <-t.C:
-				err := models.SessionCleanupByCreatedAt(time.Now().Unix() - lifeTime)
+				err := models.SessionCleanupByUpdatedAt(time.Now().Unix() - lifeTime)
 				if err != nil {
 					logger.Errorf("session gc err %s", err)
 				}