Sometimes this list could help with match issues with Nintendo.
Nintendo requires an Open Nat Type due to their games using a peer-to-peer network to connect consoles. School systems are likely to have a strict Nat Type, which would limit the connections available to the Nintendo Switch. To resolve this, port forwarding will need to be set up using the following range: 45000 and 65535 UDP (ports can be TCP or UDP). An alternative is to set up a DMZ on the school network, and only allow Nintendo Switch consoles to connect.
Additional connectivity troubleshooting below:
For step 4 under “On a PC or smart device”, instead of entering a value in between 1 and 65535, enter a value between 45000 and 65535 UDP.
Ports can be TCP or UDP.
You can also use the router's DMZ. The DMZ of your network is able to open to the whole internet separately from your internal network.
As long as schools use the Nintendo Switch in the DMZ and not any actual computers, it won’t open vulnerabilities to the network.
For further support or information on Switch connectivity, the peer-to-peer feature allows you to directly communicate with other players.
Enabling peer-to-peer connectivity within the Firewall will allow access for your team's Nintendo switch.
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