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This guide has been moved to my blog

Old post (not updated!)Most Switch communications are over TLS - this includes NEX and Eagle communications (for Nintendo Switch Online)* as well as other servers such as BAAS (friends/status) and NPNS (notifications)

*NPLN, the new Switch online servers that Monster Hunter Rise demo used, cannot be dumped with Charles currently as it doesn't support gRPC - use grpc-dump to dump these communications - the gPRC section will explain this better.