Having a Closed, Strict or Moderate NAT type can prevent you from fully enjoying all the features of an online multiplayer game.
Since this method takes into account both the device and the origin of the traffic engaged in the 'conversation', you can very well have an Open NAT type for some services or game, and a closed one for others.
The piece of hardware responsible for NAT on a local network is the router:
• If you are using a shared internet connection in a communal building - dorm, military base, hospital, etc. - you might not have access to the router.
• Some Internet Service Providers might provide you with a router, but put you behind a second router-like device that you do not have access to - this scenario is called double NAT.
We have put together connectivity troubleshooting articles for most Ubisoft games.
To find them,
• Select your game and platform.
• Type connectivity in the search bar.
An article relevant for your game will pop up with troubleshooting steps to establish an Open NAT and solve other connection-related issues.