AC+AP跨公网注册，AP能上线，但是新AP无法下载版本

如题，AP可以上线，目前已映射UDP5246-5247端口，不知道是否还有其它端口需要映射，

目前问题：新AP无法下载镜像文件

AP侧报错如下：

System is starting... 

Press Ctrl+D to access BASIC-BOOTWARE MENU 

Booting Normal Extended BootWare 

The Extended BootWare is self-decompressing........Done.

 **************************************************************************** 

                           H3C WA5630X BootWare, Version 7.27

 ***************************************************************************

Copyright (c) 2004-2021 New H3C Technologies Co., Ltd. 

Compiled Date : Mar 23 2021 

CPU Type : ARM 

CPU L1 Cache : 32KB CPU 

L2 Cache : 256KB 

CPU Clock Speed : 710MHz 

Memory Type : DDR3 SDRAM 

Memory Size : 512MB 

Memory Speed : 667MHz 

Flash Size : 128MB 

CPLD Version : 001 PCB Version : Ver.A

 BootWare Validating... 

Press Ctrl+B to access EXTENDED-BOOTWARE MENU... 

Loading the main image files... 

The image does not exist! 

Loading the backup image files... 

The image does not exist! 

Loading images fails. 

Trying to get the IP address from the DHCP server...... 

DHCP server's IP address is 192.168.1.1 

Client's assigned address is 192.168.1.11 

DNS domain name got from DHCP server is 

 DNS server's IP address is 223.5.5.5 

Default Gateway's IP address is 192.168.1.1 

This client's subnet mask is 255.255.255.0 

The length of option 43 is: 9 

 Change State : Idle to Broadcast Discovery 

 Change State : Broadcast Discovery to Unicast Discovery 

Use Option 43: 

Getting AC's IP Address 111.221.213.158 

 Change State : Unicast discovery to Sulking 

 Change State : Idle to Broadcast Discovery 

 Change State : Broadcast Discovery to Unicast Discovery 

Use Option 43: 

Getting AC's IP Address 111.221.213.158 

 Change State : Unicast discovery to Sulking 

 Can't download the image from network, please check the network settings 

 The system will reboot 

 [State : Idle] Reset request, rebooting the AP 

Rebooting......