UPNP is not turned on or parental control. Port restriction is that UPNP is not turned on or parental control is enabled, and some ports cannot be used. UPNP is turned on automatically. If there is no restricted port in the mobile network, the network status will become a full-cone network after one hour, and there is no change. You can assign the Qianbaobao IP fixedly, and set this IP to DMZ, which is still invalid, which proves that mobile has set restrictions on P2P in the large intranet.