A question about opening ports

I have a question about opening ports with the airport. I need to open up ports UDP 88 & 3074 and port TCP 3074. I am wondering if I should open these ports for the specific IP address on my network that will be using them or if I should open the ports on the gateway IP (10.0.1.1) not sure which is the right route to take. Any help would be appreciated.
These are for running an xbox over xbox live.

Typically, you will want to open these ports for the device on your local network that needs to be accessed from the Internet. In this case, it would be your Xbox 360.
Unfortunately, the AirPorts are not listed as Xbox Live-compatible routers ... so there is no guarantee doing this will get Open NAT status for Xbox Live.
The following web blog does a great job explaining the NAT issues with Xbox Live. Basically what it comes down to is that although you can get an Internet connection for the Xbox 360 with the AirPorts, you may not get the necessary NAT setting (Moderate or Open) for the Xbox Live game that you want to play. As such, Port mapping may be required to allow Xbox Live access.
The following ports must be available for Xbox Live to operate correctly:
• UDP 88
• UDP 3074
• TCP 3074
To setup port mapping on an 802.11n AirPort Extreme Base Station (AEBSn), either connect to the AEBSn's wireless network or temporarily connect directly, using an Ethernet cable, to one of the LAN port of the AEBSn, and then use the AirPort Utility, in Manual Setup, to make these settings:
1. Reserve a DHCP-provided IP address for the Xbox 360.
Internet > DHCP tab
o On the DHCP tab, click the "+" (Add) button to enter DHCP Reservations.
o Description: <enter the desired description of the host device>
o Reserve address by: MAC Address
o Click Continue.
o MAC Address: <enter the MAC hardware address of the Xbox>
o IPv4 Address: <enter the desired IP address>
o Click Done.
2. Setup Port Mapping on the AEBSn.
Advanced > Port Mapping tab
o Click the "+" (Add) button
o Service: <choose the appropriate service from the Service pop-up menu>
o Public UDP Port(s): 88, 3074
o Public TCP Port(s): 3074
o Private IP Address: <enter the DHCP Reserved IP address for the Xbox you created earlier>
o Private UDP Port(s): 88, 3074
o Private TCP Port(s): 3074
o Click "Continue"

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