Strange networking issue possibly regarding Windows 10

[Zinx777]

I don't know why Metal Gear Solid Peace Walker/Phantasy Star Portable 2 seems to be the worst offender of this.
I have a feeling this is related to how many ports the game uses or opens (at least for Peace Walker)..
The more ports the game uses the more chance you gonna get the incorrect port issue.
At least Peace Walker I know opens 4 ports on versus but I don't know on coop.
At least you didn't say that the proadhoc/ProOnline implementation is lacking because it ignores the source port lol.
I wonder what VPNs do to make the issue go away...
Also it doesn't seems to be UPNP fault I think because I got it with it being disabled and enabled with someone...
TBH i never got it on LAN once tho.
I know you dont like people reporting issues about using public IP but what could you do when its basically the default option on PPSSPP currently lol (uses socom.cc now).
I think that main issue is either ISP or NAT changing port remappings though..
I guess adenovan found this behavior as early as 2017: https://i.ibb.co/547NRQ6/image.png
https://github.com/hrydgard/ppsspp/issue...-347817114