Upnp problem

[AdamN]

There hasn't been any update to miniupnp for a long time AFAIK, so may be it's no longer compatible with the new iOS.

DMZ should be easy, you just need to set your iPhone's IP on DMZ (since DMZ can only be set for one IP), but you probably want to use static IP for your iPhone (you can register a static IP for your iPhone's MAC address somewhere in DHCP settings on your router, on my router it's called "DHCP Address Reservation"), so your iPhone will always have the DMZ.