UPnP Clash With Duplicate Initial Port

[Mongolo]

I have Open NAT on all consoles at the same time in Network Settings and Call of Duty.

I have MiniUPnP and MiniUPnP ACLs configured this way so that only Consoles can open ports and no one else, I use these static IP addresses "192.168.1.8" to "192.168.1.11" on the Consoles. (Network -> DHCP and DNS -> Static leases)

I use this page to know the CIDR Address Range:

• Online IP CIDR / VLSM Supernet Calculator (Rango IP - IP Range)

About UPnP:

• [Solved] Xbox One issues with some routers and UPnP (This includes multiple Xbox Ones)
• [Solved] Miniupnpd not opening ports for ps4
• XBOX 360 - DHCP and Manual Lease not working
• OpenWrt Project: miniupnpd