diff --git a/trunk/src/app/srs_app_rtc_dtls.cpp b/trunk/src/app/srs_app_rtc_dtls.cpp
index d5657e923..1c2a34f16 100644
--- a/trunk/src/app/srs_app_rtc_dtls.cpp
+++ b/trunk/src/app/srs_app_rtc_dtls.cpp
@@ -259,7 +259,7 @@ SrsDtls::SrsDtls(ISrsDtlsCallback* cb)
     version_ = SrsDtlsVersionAuto;
 
     trd = NULL;
-    client_state_ = SrsDtlsStateInit;
+    state_ = SrsDtlsStateInit;
 }
 
 SrsDtls::~SrsDtls()
@@ -409,8 +409,11 @@ srs_error_t SrsDtls::on_dtls(char* data, int nb_data)
 {
     srs_error_t err = srs_success;
 
-    // When got packet, always stop the ARQ.
-    if (role_ == SrsDtlsRoleClient && client_state_ == SrsDtlsStateServerHello) {
+    // When got packet, stop the ARQ if server in the first ARQ state SrsDtlsStateServerHello.
+    // @note But for ARQ state, we should never stop the ARQ, for example, we are in the second ARQ sate
+    //      SrsDtlsStateServerDone, but we got previous late wrong packet ServeHello, which is not the expect
+    //      packet SessionNewTicket, we should never stop the ARQ thread.
+    if (role_ == SrsDtlsRoleClient && state_ == SrsDtlsStateServerHello) {
         stop_arq();
     }
 
diff --git a/trunk/src/app/srs_app_rtc_dtls.hpp b/trunk/src/app/srs_app_rtc_dtls.hpp
index 03342c16e..32cb76025 100644
--- a/trunk/src/app/srs_app_rtc_dtls.hpp
+++ b/trunk/src/app/srs_app_rtc_dtls.hpp
@@ -97,12 +97,12 @@ public:
 
 // The state for DTLS client.
 enum SrsDtlsState {
-    SrsDtlsStateInit,
-    SrsDtlsStateClientHello,
-    SrsDtlsStateServerHello,
-    SrsDtlsStateClientCertificate,
-    SrsDtlsStateServerDone,
-    SrsDtlsStateClientDone,
+    SrsDtlsStateInit, // Start.
+    SrsDtlsStateClientHello, // Should start ARQ thread.
+    SrsDtlsStateServerHello, // We are in the first ARQ state.
+    SrsDtlsStateClientCertificate, // Should start ARQ thread again.
+    SrsDtlsStateServerDone, // We are in the second ARQ state.
+    SrsDtlsStateClientDone, // Done.
 };
 
 class SrsDtls : public ISrsCoroutineHandler
@@ -127,7 +127,7 @@ private:
     // @note If passive(DTLS server), the ARQ is driven by DTLS client.
     SrsCoroutine* trd;
     // The DTLS-client state to drive the ARQ thread.
-    SrsDtlsState client_state_;
+    SrsDtlsState state_;
 
     // @remark: dtls_role_ default value is DTLS_SERVER.
     SrsDtlsRole role_;