diff --git a/bin/tsg_log_field.conf b/bin/tsg_log_field.conf
index 30fba73..bc1dea0 100644
--- a/bin/tsg_log_field.conf
+++ b/bin/tsg_log_field.conf
@@ -51,4 +51,6 @@ STRING		common_server_location	42
 STRING		quic_sni			43
 STRING		ssl_ja3_hash		44
 STRING		common_data_center	45
-STRING		common_l7_protocol		46
\ No newline at end of file
+STRING		common_l7_protocol		46
+STRING		common_tcp_client_isn	47
+STRING		common_tcp_server_isn	48
\ No newline at end of file
diff --git a/src/tsg_send_log.cpp b/src/tsg_send_log.cpp
index 91c5167..f3b4cff 100644
--- a/src/tsg_send_log.cpp
+++ b/src/tsg_send_log.cpp
@@ -318,6 +318,7 @@ int TLD_append_streaminfo(struct tsg_log_instance_t *instance, struct TLD_handle
 	char nest_addr_buf[1024];
 	char *addr_proto=NULL;
 	struct timespec tv;
+	unsigned int client_isn=0,server_isn=0;
 	int size=sizeof(unsigned long long);
 	long common_con_duration_ms=0;
 	unsigned long long create_time=0;
@@ -482,7 +483,21 @@ int TLD_append_streaminfo(struct tsg_log_instance_t *instance, struct TLD_handle
 	}
 	
 	TLD_append(_handle, _instance->id2field[LOG_COMMON_DIRECTION].name, (void *)(long)direction, TLD_TYPE_LONG);
-	
+
+	size=sizeof(unsigned int);
+	ret=MESA_get_stream_opt(a_stream, MSO_TCP_ISN_C2S, &client_isn, &size);
+	if(ret==0)
+	{		
+		TLD_append(_handle, _instance->id2field[LOG_COMMON_TCP_CLIENT_ISN].name, (void *)(long)client_isn, TLD_TYPE_LONG);
+	}
+
+	size=sizeof(unsigned int);
+	ret=MESA_get_stream_opt(a_stream, MSO_TCP_ISN_S2C, &server_isn, &size);
+	if(ret==0)
+	{		
+		TLD_append(_handle, _instance->id2field[LOG_COMMON_TCP_SERVER_ISN].name, (void *)(long)server_isn, TLD_TYPE_LONG);
+	}
+
 	return 0;
 }
 
diff --git a/src/tsg_send_log_internal.h b/src/tsg_send_log_internal.h
index 8504203..ba5b03b 100644
--- a/src/tsg_send_log_internal.h
+++ b/src/tsg_send_log_internal.h
@@ -72,6 +72,8 @@ typedef enum _tsg_log_field_id
 	LOG_SSL_JA3_FINGERPRINT,
 	LOG_COMMON_DATA_CENTER,
 	LOG_COMMON_L7_PROTOCOL,
+	LOG_COMMON_TCP_CLIENT_ISN,
+	LOG_COMMON_TCP_SERVER_ISN,
 	LOG_COMMON_MAX
 }tsg_log_field_id_t;