FortiGate
FortiGate Next Generation Firewall utilizes purpose-built security processors and threat intelligence security services from FortiGuard labs to deliver top-rated protection and high performance, including encrypted traffic.
sakuraju
Staff
Staff
Article Id 230913
Description This article describes that the Nintendo Switch console supports NAT type A or B to play with other people online.
Scope FortiGate.
Solution

Outgoing firewall policy with SNAT enabled gives either NAT C or NAT D type, but game consoles like the Nintendo Switch require NAT type A or type B to play with other people online.

 

Nintendo NAT types:

Type A: The Switch can communicate online without any restrictions.

Type B: The Switch can communicate online with minor restrictions.

Type C: The Switch can communicate online with moderate restrictions

Type D: The Switch can communicate online with moderate restrictions.

NAT type D can communicate only with other units which are on NAT type A.

Type F: Cannot communicate with anyone online.

 

Solution:

 

Enable Preserve Source Port on the firewall policy gives NAT type B.

 

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