在不同的设备上，对于各种类型的 NAT 有各自不同的描述。先列举一下目前遇到的说法：

PS4

NAT类型	显示PS4™与互联网的连接方式 使用游戏的通信功能等时，可确认与其它PS4™间的连接稳定性。 Type 1：与互联网直接连接。 Type 2：通过路由器与互联网连接。 Type 3：通过路由器与互联网连接。 显示Type 3时，可能会出现无法与其它PS4™顺利通信，使PS4™的网络功能受到限制的情形。详细请参阅

XBox

OPEN NAT	MODERATE NAT	STRICT NAT
With an OPEN NAT type, you’re able to chat with other people, as well as join and host multiplayer games with people who have any NAT type on their network.	With a MODERATE NAT type, you’re able to chat and play multiplayer games with some people; however, you might not be able to hear or play with others, and normally you won’t be chosen as the host of a match.	With a STRICT NAT type, you’re only able to chat and play multiplayer games with people who have an OPEN NAT type. You can’t be chosen as the host of a match.

PC

NatTypeTester

Full Cone

Restricted Cone

Port Restricted Cone

Symmetric

其中的对应关系为：

Platform	Great	Not Good	Bad
PS4, PS3	NAT Type 1	NAT Type 2	NAT Type 3
Xbox One, 360	NAT Type Open	NAT Type Moderate	NAT Type Strict
PC	Full Cone	Restricted Cone Port Restricted Cone	Symmetric

未完，后面会介绍具体的信息。