Is this app unable to transfer udp?

[qwased]

Still get a low NAT type (NAT D - could not receive udp)on my nintendo switch.But downloading and viewing website is ok.

[Mygod]

This app should work fine with UDP theoretically but I haven't tested it so I'll look into that when possible. However your case is slightly complicated. Could you share definitions of NAT types for Nintendo Switch? I think Android uses UPnP for service discovery under Wi-Fi direct mode so that could be a problem. This probably could be fixed, but first could you test NAT types with this app under native AP mode following theae directions: 1. You have to be on 0.1.0+ for this; 2. Turn on Hotspot in Android system; (not the one in app) 3. Turn on the main switch of this app; 4. Connect your Switch and see what's the connection type.

[qwased]

Tested the nat type of SSR,maybe it is causing the problem

This is turning off SSR and get NAT B (port restricted cone)

With SSR on my router,get a full cone

But with SSR android,just become NAT D.Even though "tranfer UDP"selected in SSR, it seems not working.So setting hotspot with SSR won't work either.

[Mygod]

I can verify that UDP forwarding isn't working. I'll fix it sometime.

[qwased]

Doing some research about android hotspot and figure out that android hotspot do not support UPNP so we can never get an open nat on it.Thanks for your work anyway

[Mygod]

Some further test shows that basic UDP forwarding actually is working. Maybe it has something to do with MTUs but I'm not sure. Let's keep this issue open for now.

[Mygod]

Seems like the problem on my side is just MTU. UDP seems to be working fine. Closing.