diff --git a/Modles/login.go b/Modles/login.go
index 4ee5dda..8ddce90 100644
--- a/Modles/login.go
+++ b/Modles/login.go
@@ -17,6 +17,7 @@ type LoginInfo struct {
 	UrlLoginPage       string
 	UrlGetChallengeApi string
 	UrlLoginApi        string
+	UrlCheckApi        string
 
 	Ip              string
 	Token           string
diff --git a/Util/checker.go b/Util/checker.go
index b27f2dc..949d915 100644
--- a/Util/checker.go
+++ b/Util/checker.go
@@ -1,18 +1,36 @@
 package Util
 
 import (
+	"Mmx/Request"
+	"fmt"
 	"net"
+	"time"
 )
 
 type checker struct{}
 
 var Checker checker
 
-func (checker) NetOk() bool {
-	if ip, err := net.LookupIP("www.msftconnecttest.com"); err != nil {
+func (checker) NetOk(url string) bool {
+	if ip, err := net.LookupIP("www.msftconnecttest.com"); err != nil { //通过DNS确认是否在线
 		return false
 	} else if len(ip) == 0 || ip[0].String() != "13.107.4.52" {
 		return false
 	}
+
+	{ //有些路由器有DNS缓存，故进行进一步确认
+		body, err := Request.Get(url, map[string]string{
+			"callback": "jQuery1635413",
+			"_":        fmt.Sprint(time.Now().UnixNano()),
+		})
+		ErrHandler(err)
+		r, err := GetResult(body)
+		if err != nil {
+			ErrHandler(err)
+		}
+		if r != "ok" {
+			return false
+		}
+	}
 	return true
 }
diff --git a/Util/config.go b/Util/config.go
index 3b0864f..df1105e 100644
--- a/Util/config.go
+++ b/Util/config.go
@@ -20,6 +20,7 @@ func (*config) Generate(Form *Modles.LoginForm, Meta *Modles.LoginMeta) *Modles.
 		UrlLoginPage:       "http://" + Form.Domain + "/srun_portal_success",
 		UrlGetChallengeApi: "http://" + Form.Domain + "/cgi-bin/get_challenge",
 		UrlLoginApi:        "http://" + Form.Domain + "/cgi-bin/srun_portal",
+		UrlCheckApi:        "http://" + Form.Domain + "/cgi-bin/rad_user_info",
 		Meta:               Meta,
 		Form: &Modles.LoginForm{
 			UserName: Form.UserName + "@cmcc",
diff --git a/Util/util.go b/Util/util.go
index e7c1105..a9c6725 100644
--- a/Util/util.go
+++ b/Util/util.go
@@ -37,8 +37,8 @@ func GetResult(body string) (string, error) {
 
 func Md5(content string) string {
 	w := md5.New()
-	_, _ = io.WriteString(w, content)    //将str写入到w中
-	return fmt.Sprintf("%x", w.Sum(nil)) //w.Sum(nil)将w的hash转成[]byte格式
+	_, _ = io.WriteString(w, content)
+	return fmt.Sprintf("%x", w.Sum(nil))
 }
 
 func Sha1(content string) string {
diff --git a/main.go b/main.go
index c9a5e3f..57acc2b 100644
--- a/main.go
+++ b/main.go
@@ -6,13 +6,14 @@ import (
 	"Mmx/Util"
 	"encoding/json"
 	"fmt"
+	"time"
 )
 
 func main() {
 	fmt.Println("Step0: 检查状态…")
 	G := Util.Config.Init()
 
-	if Global.Config.Settings.QuitIfNetOk && Util.Checker.NetOk() {
+	if Global.Config.Settings.QuitIfNetOk && Util.Checker.NetOk(G.UrlCheckApi) {
 		fmt.Println("网络正常，程序退出")
 		return
 	}
@@ -56,7 +57,7 @@ func main() {
 		G.EncryptedChkstr = Util.Sha1(chkstr)
 
 		res, err := Request.Get(G.UrlLoginApi, map[string]string{
-			"callback":     "jQuery1124011576657442209481_1602812074032",
+			"callback":     "jQuery112401157665",
 			"action":       "login",
 			"username":     G.Form.UserName,
 			"password":     G.EncryptedMd5,
@@ -69,7 +70,7 @@ func main() {
 			"os":           "Windows 10",
 			"name":         "windows",
 			"double_stack": "0",
-			"_":            "1602812428675",
+			"_":            fmt.Sprint(time.Now().UnixNano()),
 		})
 		Util.ErrHandler(err)
 		G.LoginResult, err = Util.GetResult(res)