NAT (Network Address Translation) type determination method, client, system and storage medium

The embodiment of the invention provides an NAT (Network Address Translation) type determination method, a client, a system and a storage medium, and relates to the technical field of wireless communication, and the scheme comprises the following steps: sending multiple times of test information to a first port of first service equipment, the first port corresponding to a first address; the reply information further comprises an address and a port of the client in the second network. And sending the first test information to a second port of the second service equipment. The NAT type of the first network is determined according to reply information of the first service device and reply information of the second service device, and the reply information of the first service device comprises reply information sent by the first service device from the first port and reply information sent by the first service device from a fourth port corresponding to the second address; and reply information sent by the first s