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AirPort - Port Mapping Basics using AirPort Utility v6.x

Last modified: Jun 17, 2016 10:14 AM
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15 6 likes 88,834 views Last modified Jun 17, 2016 10:14 AM

The following instructions provides the basics for setting up the 802.11n or 802.11ac AirPort base stations for port mapping/forwarding using v6.x of the AirPort Utility:

Port Mapping Setup

(Note: The port mapping setup is the same for the entire family of 802.11n & 802.11ac AirPort base stations.)

To setup port mapping on an 802.11n AirPort Express Base Station (AXn), connect to the base station's wireless network. For any 802.11n or 802.11ac AirPort Extreme Base Station (AEBS) or Time Capsule (TC) you can connect to either the base station's Wi-Fi network or temporarily connect directly, using an Ethernet cable, to one of the base station's LAN (opposing arrows) ports, and then, use the AirPort Utility to make these settings:

1. Reserve a DHCP-provided IP address for the host device.

(Note this is the device that you want to access from a remote location.)

AirPort Utility > Select the base station > Edit > Network tab

  • Verify that the option Router Mode = DHCP and NAT
  • Click the "+" (Add) button under DHCP Reservations.
  • Description: <enter the desired description of the host device>
  • Reserve address by: MAC Address
  • MAC Address: <enter the MAC (what Apple calls Ethernet ID if you are using wired or AirPort ID if wireless) hardware address of the host computer>
  • IP Address: <enter the desired Private (LAN-side) IP address that you want to reserve from the DHCP pool of addresses>
  • Click "Save"

2. Setup Port Mapping on the base station.

AirPort Utility > Select the base station > Edit > Network tab

  • Click the "+" (Add) button under Port Mapping.
  • Description: <enter the desired description for what you are mapping>
  • Public UDP Ports: <enter the appropriate UDP port value(s)>
  • Public TCP Ports: <enter the appropriate TCP port value(s)>
  • Private IP Address: <enter the reserved IP address of the host device (from step 1)>
  • Private UDP Ports: <enter the same Public UDP Ports or your choice>
  • Private TCP Ports: <enter the same Public TCP Ports or your choice>
  • Click "Save"

(ref: "Well Known" TCP and UDP ports used by Apple software products)