Gentilissimo Forum, mi permetto di segnalarvi questa notizia. L'ho testata personalmente e funziona. E' la svolta del multiplayer online in VPN. Grazie e scusate il disturbo.
PPSSPP Adhoc Client/Server Opensource VPN Alternative (SoftEther).
Unlimited Number Of Net Player on The Same Room.
No DMZ router restriction.
No NAT needed.
Linux/Mac/Android/Windows Connection Support
Work on 2G/3G/4G/wi-fi/Cable

A real Alternative to coldbird "Prometheus Online".
We are In The Lobby!

PSP VPN Supported games:

Tekken 6
Soul Calibur
Dragon Ball Z - Shin Budokai
God Eater Burst
Metal Gear Solid - Portable Ops
Monster Hunter 2G
Monster Hunter 3
NPJH50878 (Toukiden Kiwami)
God Eater Burst 2
Metal Gear Solid - Peace Walker
Metal Gear Solid - Portable Ops
NPJH50832 (God Eater 2)
ULJM05238 (Kidou Senshi Gundam Seed: Rengou vs. Z.A.F.T. Portable)
Gundam VS Gundam - Next Plus