Question: How to block Public TCP port and ALLOW Private port forwarding on AirPort Extreme
I am using port forwarding on my Airport Extreme for a few devices and it works as expected. I would like restrict VNC use to my local Private network and block Public access on port 5500. Seems simple enough but when define a new mapping, the Public TCP and UDP field are required. You can not leave them blank and only define the Private ports (see below).
Before everyone suggests blocking that port on the modem/router, let me say I'm using the DSL modem in a pass-through mode so all configuration is on the AirPort Extreme, which I love. I can't even access the DSL modem without reconfiguring it. If I noodled around on this I could probably figure something our but, what is the best way to accomplish this on the AirPort Extreme - block access to a specific port for Public WAN access but allow Private port access?
Thanks in advance for your response!