Make sure NAT-PMP or UPnP is enabled (if you are using an AirPort Extreme Gigabit Ethernet base station, click here for information about AirPort Extreme Gigabit Ethernet and NAT PMP). >> I followed the advice I could on how to turn UPnP on for the router - in advanced, under UPnP, check both boxes and selected the "main" option
PSA for Xbox One and Apple Users--NAT-type "strict" The devices I'm working with are: Xbox One, Airport Express, Mac Mini, Macbook Pro, iPad, iPhone. The issue was that my Xbox could connect to my wireless network but not to the Internet, and so I couldn't connect to Xbox Live at all--couldn't download content, access my tabs, nothing. Airport Extreme - Does it support Xbox 360? | MacRumors Forums Jan 09, 2012
Dec 21, 2013
Make sure NAT-PMP or UPnP is enabled (if you are using an AirPort Extreme Gigabit Ethernet base station, click here for information about AirPort Extreme Gigabit Ethernet and NAT PMP). Ensure TCP port 5354 and UDP ports 4500 and 5353 are open on your firewall. To learn more about ports used by Apple products, click here. network - Configure Airport to routers DMZ IP - Ask Different
The problem was that the Airport Extreme router was configured to use the same range of IP addresses as the VPN, so while I was able to connect to the VPN there was some issues when trying to SSH into some of the servers where there was an IP conflict.
Automatically creating the necessary inbound port mappings helped remedy this unwanted side effect of NAT. The server side of the NAT-PMP protocol is implemented in Apple's AirPort Extreme, AirPort Express, and Time Capsule wireless base stations, and in the Internet Sharing feature of Mac OS X 10.4 and later.