diff --git a/app/appearance/langs/en_US.json b/app/appearance/langs/en_US.json
index c5282c5a4..5900c18df 100644
--- a/app/appearance/langs/en_US.json
+++ b/app/appearance/langs/en_US.json
@@ -1026,7 +1026,7 @@
     "73": "Importing, please wait...",
     "74": "The kernel has not been fully booted [%d%%], please try again later",
     "75": "Attempt to access file failed",
-    "76": "TODO",
+    "76": "The network connectivity verification of the cloud storage service provider is abnormal, please check the network configuration",
     "77": "Invalid dir path [%s]",
     "78": "The old and new paths are repeated",
     "79": "Only supports importing Markdown document",
diff --git a/app/appearance/langs/es_ES.json b/app/appearance/langs/es_ES.json
index 6db3e5b93..c384168ec 100644
--- a/app/appearance/langs/es_ES.json
+++ b/app/appearance/langs/es_ES.json
@@ -1026,7 +1026,7 @@
     "73": "Importando, por favor espere...",
     "74": "El kernel no ha sido arrancado completamente [%d%%], por favor, inténtelo de nuevo más tarde",
     "75": "Error al intentar acceder al archivo",
-    "76": "TODO",
+    "76": "La verificaci\u00f3n de conectividad de red del proveedor de servicios de almacenamiento en la nube es anormal, verifique la configuraci\u00f3n de red",
     "77": "Ruta inválida [%s]",
     "78": "Los viejos y nuevos caminos se repiten",
     "79": "Sólo admite la importación de documentos Markdown",
diff --git a/app/appearance/langs/fr_FR.json b/app/appearance/langs/fr_FR.json
index 6867cd17c..63fc391a8 100644
--- a/app/appearance/langs/fr_FR.json
+++ b/app/appearance/langs/fr_FR.json
@@ -1026,7 +1026,7 @@
     "73": "En cours d'importation, veuillez patienter...",
     "74": "Le kernel n'a pas été complètement démarré [%d%%], veuillez réessayer plus tard.",
     "75": "La tentative d'accès au fichier a échoué",
-    "76": "TODO",
+    "76": "La vérification de la connectivité réseau du fournisseur de service de stockage cloud est anormale, veuillez vérifier la configuration réseau",
     "77": "Chemin d'accès invalide [%s]",
     "78": "Les anciens et les nouveaux chemins sont répétés",
     "79": "Prise en charge de l'importation de documents Markdown uniquement",
diff --git a/app/appearance/langs/zh_CHT.json b/app/appearance/langs/zh_CHT.json
index 7c7e4861a..d7059338f 100644
--- a/app/appearance/langs/zh_CHT.json
+++ b/app/appearance/langs/zh_CHT.json
@@ -1026,7 +1026,7 @@
     "73": "正在導入，請稍等...",
     "74": "kernel尚未完全啟動 [%d%%]，請稍後再試",
     "75": "嘗試訪問資料檔失敗",
-    "76": "TODO",
+    "76": "雲端存儲服務提供商網絡連通性校驗異常，請檢查網絡配置",
     "77": "不可用的目錄路徑 [%s]",
     "78": "新老路徑重複",
     "79": "僅支援導入 Markdown 文檔",
diff --git a/app/appearance/langs/zh_CN.json b/app/appearance/langs/zh_CN.json
index ad611e7f7..577ab1cf7 100644
--- a/app/appearance/langs/zh_CN.json
+++ b/app/appearance/langs/zh_CN.json
@@ -1026,7 +1026,7 @@
     "73": "正在导入，请稍等...",
     "74": "内核尚未完全启动 [%d%%]，请稍后再试",
     "75": "尝试访问文件失败",
-    "76": "TODO",
+    "76": "云端存储服务提供商网络连通性校验异常，请检查网络配置",
     "77": "不可用的目录路径 [%s]",
     "78": "新老路径重复",
     "79": "仅支持导入 Markdown 文档",
diff --git a/app/electron/main.js b/app/electron/main.js
index 2e4b1b252..1ea464de7 100644
--- a/app/electron/main.js
+++ b/app/electron/main.js
@@ -945,23 +945,10 @@ powerMonitor.on("suspend", () => {
 powerMonitor.on("resume", async () => {
     // 桌面端系统休眠唤醒后判断网络连通性后再执行数据同步 https://github.com/siyuan-note/siyuan/issues/6687
     writeLog("system resume");
+
+    const eNet = require("electron").net
     const isOnline = async () => {
-        try {
-            const result = await fetch("https://www.baidu.com", {timeout: 1000});
-            return 200 === result.status;
-        } catch (e) {
-            try {
-                const result = await fetch("https://icanhazip.com", {timeout: 1000});
-                return 200 === result.status;
-            } catch (e) {
-                try {
-                    const result = await fetch("https://api.ipify.org", {timeout: 1000});
-                    return 200 === result.status;
-                } catch (e) {
-                    return false;
-                }
-            }
-        }
+        return eNet.isOnline()
     };
     let online = false;
     for (let i = 0; i < 7; i++) {
diff --git a/kernel/conf/sync.go b/kernel/conf/sync.go
index bf80edf79..910bb1721 100644
--- a/kernel/conf/sync.go
+++ b/kernel/conf/sync.go
@@ -62,3 +62,7 @@ const (
 	ProviderS3     = 2 // ProviderS3 为 S3 协议对象存储提供的云端存储服务
 	ProviderWebDAV = 3 // ProviderWebDAV 为 WebDAV 协议提供的云端存储服务
 )
+
+func NewSyncProviderCheckURL() string {
+	return "https://www.baidu.com"
+}
diff --git a/kernel/model/conf.go b/kernel/model/conf.go
index f62182955..2b0c3956e 100644
--- a/kernel/model/conf.go
+++ b/kernel/model/conf.go
@@ -297,7 +297,7 @@ func InitConf() {
 	if 0 > Conf.Editor.BacklinkExpandCount {
 		Conf.Editor.BacklinkExpandCount = 0
 	}
-	if 0> Conf.Editor.BackmentionExpandCount {
+	if 0 > Conf.Editor.BackmentionExpandCount {
 		Conf.Editor.BackmentionExpandCount = 0
 	}
 
diff --git a/kernel/model/sync.go b/kernel/model/sync.go
index 1d570c1aa..f1cde1ade 100644
--- a/kernel/model/sync.go
+++ b/kernel/model/sync.go
@@ -46,7 +46,7 @@ func SyncDataDownload() {
 	}
 
 	util.BroadcastByType("main", "syncing", 0, Conf.Language(81), nil)
-	if !util.IsOnline() { // 这个操作比较耗时，所以要先推送 syncing 事件后再判断网络，这样才能给用户更即时的反馈
+	if !isProviderOnline() { // 这个操作比较耗时，所以要先推送 syncing 事件后再判断网络，这样才能给用户更即时的反馈
 		util.BroadcastByType("main", "syncing", 2, Conf.Language(28), nil)
 		return
 	}
@@ -82,7 +82,7 @@ func SyncDataUpload() {
 	}
 
 	util.BroadcastByType("main", "syncing", 0, Conf.Language(81), nil)
-	if !util.IsOnline() { // 这个操作比较耗时，所以要先推送 syncing 事件后再判断网络，这样才能给用户更即时的反馈
+	if !isProviderOnline() { // 这个操作比较耗时，所以要先推送 syncing 事件后再判断网络，这样才能给用户更即时的反馈
 		util.BroadcastByType("main", "syncing", 2, Conf.Language(28), nil)
 		return
 	}
@@ -136,7 +136,7 @@ func BootSyncData() {
 		return
 	}
 
-	if !util.IsOnline() {
+	if !isProviderOnline() {
 		BootSyncSucc = 1
 		util.PushErrMsg(Conf.Language(28), 7000)
 		return
@@ -182,7 +182,7 @@ func syncData(boot, exit, byHand bool) {
 	}
 
 	util.BroadcastByType("main", "syncing", 0, Conf.Language(81), nil)
-	if !util.IsOnline() { // 这个操作比较耗时，所以要先推送 syncing 事件后再判断网络，这样才能给用户更即时的反馈
+	if !isProviderOnline() { // 这个操作比较耗时，所以要先推送 syncing 事件后再判断网络，这样才能给用户更即时的反馈
 		util.BroadcastByType("main", "syncing", 2, Conf.Language(28), nil)
 		return
 	}
@@ -565,3 +565,22 @@ func IncSync() {
 func planSyncAfter(d time.Duration) {
 	syncPlanTime = time.Now().Add(d)
 }
+
+func isProviderOnline() (ret bool) {
+	checkURL := util.SiYuanSyncServer
+	switch Conf.Sync.Provider {
+	case conf.ProviderSiYuan:
+	case conf.ProviderS3:
+		checkURL = Conf.Sync.S3.Endpoint
+	case conf.ProviderWebDAV:
+		checkURL = Conf.Sync.WebDAV.Endpoint
+	default:
+		logging.LogWarnf("unknown provider: %d", Conf.Sync.Provider)
+		util.IsOnline("")
+	}
+
+	if ret = util.IsOnline(checkURL); !ret {
+		util.PushErrMsg(Conf.Language(76), 5000)
+	}
+	return
+}
diff --git a/kernel/util/net.go b/kernel/util/net.go
index 377e01442..d742d1830 100644
--- a/kernel/util/net.go
+++ b/kernel/util/net.go
@@ -18,6 +18,7 @@ package util
 
 import (
 	"net/http"
+	"net/url"
 	"strings"
 	"time"
 
@@ -30,21 +31,36 @@ import (
 	"github.com/siyuan-note/logging"
 )
 
-func IsOnline() (ret bool) {
-	c := req.C().SetTimeout(1 * time.Second)
-	resp, err := c.R().Head("https://www.baidu.com")
-	if nil != err {
-		resp, err = c.R().Head("https://icanhazip.com")
-		if nil != err {
-			resp, err = c.R().Head("https://api.ipify.org")
+func IsOnline(checkURL string) bool {
+	if "" == checkURL {
+		if isOnline("https://www.baidu.com") {
+			return true
 		}
+
+		if isOnline("https://icanhazip.com") {
+			return true
+		}
+
+		if isOnline("https://api.ipify.org") {
+			return true
+		}
+
+		logging.LogWarnf("network is offline")
+		return false
 	}
 
-	ret = nil == err && nil != resp && nil != resp.Response
-	if !ret {
-		logging.LogWarnf("network is offline: %v", err)
+	if isOnline(checkURL) {
+		return true
 	}
-	return
+
+	logging.LogWarnf("network is offline [checkURL=%s]", checkURL)
+	return false
+}
+
+func isOnline(checkURL string) bool {
+	c := req.C().SetTimeout(1 * time.Second)
+	_, err := c.R().Head("https://www.baidu.com")
+	return nil == err
 }
 
 func GetRemoteAddr(session *melody.Session) string {
@@ -82,6 +98,11 @@ func InvalidIDPattern(idArg string, result *gulu.Result) bool {
 	return true
 }
 
+func IsValidURL(str string) bool {
+	_, err := url.Parse(str)
+	return nil == err
+}
+
 func initHttpClient() {
 	http.DefaultClient = httpclient.GetCloudFileClient2Min()
 	http.DefaultTransport = httpclient.NewTransport(false)