diff --git a/src/sync/inc/syncMsg.h b/src/sync/inc/syncMsg.h
index 73f4223c882ff9ce544984b37843070cf579c44a..f589379aa2cc0688a3f057319d660e8c58c6bdeb 100644
--- a/src/sync/inc/syncMsg.h
+++ b/src/sync/inc/syncMsg.h
@@ -37,7 +37,8 @@ typedef enum {
   TAOS_SMSG_SETUP_RSP     = 12,
   TAOS_SMSG_SYNC_FILE     = 13,
   TAOS_SMSG_SYNC_FILE_RSP = 14,
-  TAOS_SMSG_END           = 15,
+  TAOS_SMSG_TEST          = 15,
+  TAOS_SMSG_END           = 16
 } ESyncMsgType;
 
 typedef enum {
@@ -132,6 +133,7 @@ void syncBuildSyncReqMsg(SSyncMsg *pMsg, int32_t vgId);
 void syncBuildSyncDataMsg(SSyncMsg *pMsg, int32_t vgId);
 void syncBuildSyncSetupMsg(SSyncMsg *pMsg, int32_t vgId);
 void syncBuildPeersStatus(SPeersStatus *pMsg, int32_t vgId);
+void syncBuildSyncTestMsg(SSyncMsg *pMsg, int32_t vgId);
 
 void syncBuildFileAck(SFileAck *pMsg, int32_t vgId);
 void syncBuildFileInfo(SFileInfo *pMsg, int32_t vgId);
diff --git a/src/sync/src/syncMain.c b/src/sync/src/syncMain.c
index d69843217691b5e1dbab8c37c2f49fe9760b9491..6e8703961233c44eb6c94b6ad71fb5b62e1ec812 100644
--- a/src/sync/src/syncMain.c
+++ b/src/sync/src/syncMain.c
@@ -1179,6 +1179,20 @@ static void syncCreateRestoreDataThread(SSyncPeer *pPeer) {
   }
 }
 
+static void syncProcessTestMsg(SSyncMsg *pMsg, SOCKET connFd) {
+  sInfo("recv sync test msg");
+
+  SSyncMsg rsp;
+  syncBuildSyncTestMsg(&rsp, -1);
+  if (taosWriteMsg(connFd, &rsp, sizeof(SSyncMsg)) != sizeof(SSyncMsg)) {
+    sInfo("failed to send sync test rsp since %s", strerror(errno));
+  }
+
+  sInfo("send sync test rsp");
+  taosMsleep(1000);
+  taosCloseSocket(connFd);
+}
+
 static void syncProcessIncommingConnection(SOCKET connFd, uint32_t sourceIp) {
   char    ipstr[24];
   int32_t i;
@@ -1200,6 +1214,11 @@ static void syncProcessIncommingConnection(SOCKET connFd, uint32_t sourceIp) {
     return;
   }
 
+  if (msg.head.type == TAOS_SMSG_TEST) {
+    syncProcessTestMsg(&msg, connFd);
+    return;
+  }
+
   int32_t     vgId = msg.head.vgId;
   SSyncNode **ppNode = taosHashGet(tsVgIdHash, &vgId, sizeof(int32_t));
   if (ppNode == NULL || *ppNode == NULL) {
diff --git a/src/sync/src/syncMsg.c b/src/sync/src/syncMsg.c
index 034f9a98a70c7373b74a84d24d478b52d7bf4df9..9718a3414e3bad6d303e4c844c7120582237c83e 100644
--- a/src/sync/src/syncMsg.c
+++ b/src/sync/src/syncMsg.c
@@ -86,6 +86,7 @@ static void syncBuildMsg(SSyncMsg *pMsg, int32_t vgId, ESyncMsgType type) {
 void syncBuildSyncReqMsg(SSyncMsg *pMsg, int32_t vgId) { syncBuildMsg(pMsg, vgId, TAOS_SMSG_SYNC_REQ); }
 void syncBuildSyncDataMsg(SSyncMsg *pMsg, int32_t vgId) { syncBuildMsg(pMsg, vgId, TAOS_SMSG_SYNC_DATA); }
 void syncBuildSyncSetupMsg(SSyncMsg *pMsg, int32_t vgId) { syncBuildMsg(pMsg, vgId, TAOS_SMSG_SETUP); }
+void syncBuildSyncTestMsg(SSyncMsg *pMsg, int32_t vgId) { syncBuildMsg(pMsg, vgId, TAOS_SMSG_TEST); }
 
 void syncBuildPeersStatus(SPeersStatus *pMsg, int32_t vgId) {
   pMsg->head.type = TAOS_SMSG_STATUS;
diff --git a/src/util/CMakeLists.txt b/src/util/CMakeLists.txt
index 3606aea76b91c8bc272cf658065443f65fd3fd28..92e030ad81760ed6ede1b7e53128b731b382097d 100644
--- a/src/util/CMakeLists.txt
+++ b/src/util/CMakeLists.txt
@@ -2,6 +2,7 @@ CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/src/rpc/inc)
+INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/src/sync/inc)
 AUX_SOURCE_DIRECTORY(src SRC)
 ADD_LIBRARY(tutil ${SRC})
 TARGET_LINK_LIBRARIES(tutil pthread osdetail lz4 z)
diff --git a/src/util/src/tnettest.c b/src/util/src/tnettest.c
index fe6dfb493d3b8293ad6cbdcf42b0122f991e36a2..7e39715cd954d5aa31f7dccb65f8ef5c3a9c5e57 100644
--- a/src/util/src/tnettest.c
+++ b/src/util/src/tnettest.c
@@ -23,6 +23,8 @@
 #include "tsocket.h"
 #include "trpc.h"
 #include "rpcHead.h"
+#include "tchecksum.h"
+#include "syncMsg.h"
 
 #define MAX_PKG_LEN (64 * 1000)
 #define BUFFER_SIZE (MAX_PKG_LEN + 1024)
@@ -408,13 +410,51 @@ static void taosNetTestStartup(char *host, int32_t port) {
   free(pStep);
 }
 
+static void taosNetCheckSync(char *host, int32_t port) {
+  uint32_t ip = taosGetIpv4FromFqdn(host);
+  if (ip == 0xffffffff) {
+    uError("failed to get IP address from %s since %s", host, strerror(errno));
+    return;
+  }
+
+  SOCKET connFd = taosOpenTcpClientSocket(ip, (uint16_t)port, 0);
+  if (connFd < 0) {
+    uError("failed to create socket while test port:%d since %s", port, strerror(errno));
+    return;
+  }
+
+  SSyncMsg msg;
+  memset(&msg, 0, sizeof(SSyncMsg));
+  SSyncHead *pHead = &msg.head;
+  pHead->type = TAOS_SMSG_TEST;
+  pHead->protocol = SYNC_PROTOCOL_VERSION;
+  pHead->signature = SYNC_SIGNATURE;
+  pHead->code = 0;
+  pHead->cId = 0;
+  pHead->vgId = -1;
+  pHead->len = sizeof(SSyncMsg) - sizeof(SSyncHead);
+  taosCalcChecksumAppend(0, (uint8_t *)pHead, sizeof(SSyncHead));
+
+  if (taosWriteMsg(connFd, &msg, sizeof(SSyncMsg)) != sizeof(SSyncMsg)) {
+    uError("failed to test port:%d while send msg since %s", port, strerror(errno));
+    return;
+  }
+
+  if (taosReadMsg(connFd, &msg, sizeof(SSyncMsg)) != sizeof(SSyncMsg)) {
+    uError("failed to test port:%d while recv msg since %s", port, strerror(errno));
+  }
+
+  uInfo("successed to test TCP port:%d", port);
+  taosCloseSocket(connFd);
+}
+
 static void taosNetTestRpc(char *host, int32_t startPort, int32_t pkgLen) {
-  int32_t endPort = startPort + 9;
+  int32_t endPort = startPort + TSDB_PORT_SYNC;
   char    spi = 0;
 
   uInfo("check rpc, host:%s startPort:%d endPort:%d pkgLen:%d\n", host, startPort, endPort, pkgLen);
-    
-  for (uint16_t port = startPort; port <= endPort; port++) {
+
+  for (uint16_t port = startPort; port < endPort; port++) {
     int32_t sendpkgLen;
     if (pkgLen <= tsRpcMaxUdpSize) {
       sendpkgLen = tsRpcMaxUdpSize + 1000;
@@ -442,6 +482,8 @@ static void taosNetTestRpc(char *host, int32_t startPort, int32_t pkgLen) {
       uInfo("successed to test UDP port:%d", port);
     }
   }
+
+  taosNetCheckSync(host, endPort);
 }
 
 static void taosNetTestClient(char *host, int32_t startPort, int32_t pkgLen) {