I just helped a gentleman running an Apple Time Capsule router (same as Airport Extreme with the built in backup drive).
We found out that the Airport routers do not support uPNP. We needed to use manual port forwarding. Here is a pdf which describes how to add port forwarding to the Apple router.
https://www.rainmachine.com/support/portforwarding/Port-Forwarding-Apple-AirPortExtreme-Router-for-HTTPS.pdf
You only need to add one port forwarding rule to the Apple Airport (or Time Capsule) router.
On page 4 of the PDF it shows how to add the port forwarding.. Here are the setting you need to enter.
Description: SmartLink
Public UDP Ports: 22000
Public TCP Ports: 21000
Private IP Address: <enter the IP address of the radio>
Private UDP Port(s): 4993
Private TCP Port(s): 4994
Click Save button> The router will reboot.
Next go into SmartLink Setup and expand Network Settings. Click Manual and enter the following settings

Click Save then click the test button. You should get a green indicator and if you hover over it (SmartSDR) or click it (Maestro) the bottom section UDP and TCP should show pass.
Dave wo2x
We found out that the Airport routers do not support uPNP. We needed to use manual port forwarding. Here is a pdf which describes how to add port forwarding to the Apple router.
https://www.rainmachine.com/support/portforwarding/Port-Forwarding-Apple-AirPortExtreme-Router-for-HTTPS.pdf
You only need to add one port forwarding rule to the Apple Airport (or Time Capsule) router.
On page 4 of the PDF it shows how to add the port forwarding.. Here are the setting you need to enter.
Description: SmartLink
Public UDP Ports: 22000
Public TCP Ports: 21000
Private IP Address: <enter the IP address of the radio>
Private UDP Port(s): 4993
Private TCP Port(s): 4994
Click Save button> The router will reboot.
Next go into SmartLink Setup and expand Network Settings. Click Manual and enter the following settings
Click Save then click the test button. You should get a green indicator and if you hover over it (SmartSDR) or click it (Maestro) the bottom section UDP and TCP should show pass.
Dave wo2x
David Decoons wo2x, Elmer
Dave
Jay / NO5J
Thanks for the quick reply! I had no particular reason to setup the 1 to 1 pairings I used, and thought I might have overlooked something important.
SDRgadgets
#FlexRadio IRC chat
73, Jay - NO5J
WH6HI - Pat
David Decoons wo2x, Elmer
Dave
Mark - N7MHB
WH6HI - Pat