"rtmfp" does not work on Android host

Hello my friend

I created a simple p2p game with Rtmfp. But when the two android, one host, it does not work.
I think probably the problem of nat device.
I noticed the change of the nat device, must be root android, which I did not like.

Is this true?

my second option in http://cc.rtmfp.net/ , "Public UDP ...", with Android, I answered "No".

Thank you