If UPNP is on and the NAT type will turn into NAT1, the network traversal will be in normal status.
There are 3 types of UPNP status as:
If DMZ is on, and the NAT type will turn into NAT1, and UPNP will probably turn invalid into Intranet IP or in off status.1.On: UPNP is on and the network can traverse successfully.
2.Intranet IP: although UPNP is on, the external network fails in mapping. If the device is connected under two-step routing, it will probably show as Intranet IP.
3.Off: UPNP is off or on but invalid, it is necessary to reset the higher level router.
Please see the following link to know more details of NAT types:
viewtopic.php?f=19&t=4703
How to set UPNP and DMZ for different routers:
这里以路由器系统作为区分Here we classify the routers according to their systems:
Official setting instructions for TP-Link:
https://service.tp-link.com.cn/detail_article_2936.html
How to set UPNP for Ikuai devices:
https://en.ikuai8.com/support_article.php?id=0000000683
How to set DMZ for Ikuai devices:
https://en.ikuai8.com/support_article.php?id=0000000681
How to set UPNP for GOCLOUD devices:
To be added
How to set DMZ for GOCLOUD devices:
To be added
How to set UPNP for ROS devices:
http://www.myxzy.com/post-140.html
How to set DMZ for ROS devices:
https://www.ros5.com/406.html
How to set UPNP for Koolshare devices:
https://n.szm1.tk/topic/12/梅林开启upnp
How to set DMZ for Koolshare devices:
https://n.szm1.tk/topic/13/梅林dmz