I have airport extreme and just purchased a D-Link DCS-932L home network camera. D-Link says I need UpNp but the extreme doesn't support this. Can I use port mapping? if so anyone know how to set that up? thanks

I suggest that you assign the camera a static IP address and use the airport utility to configure port mapping for the ports in the camera manual. That should do the trick.

Since the D-Link DCS-932L is accessible on the local network via a web browser, you should be able to access this camera from the Internet if your router has a publically accessible Public IP address. If your ISP provides you with a dynamic Public IP address, you may want to use a DDNS service to make it easier for you to locate your camera whenever your ISP changes your IP address.

1. Start the AirPort Utility > Select the 802.11n AirPort Extreme Base Station (AEBSn).
2. Select Manual Setup.
3. Verify that Connection Sharing = Share a public IP address is selected on the Internet > Internet Connection tab.
4. Select Advanced, and then, select the Port Mapping tab.
5. Click the plus sign to add a new port mapping.
6. For Service, leave the default; this will change to "Custom" once you start entering port values.
7. In the Public UDP Port(s) and Public TCP Port(s) boxes, type in a 4-digit port number (e.g., 8888) that you choose. In the Private IP Address box, type the internal IP address of your camera. In the Private UDP Port(s) and Private TCP Port(s) boxes, enter the appropriate port values that should have been provided to you by the camera manufacturer. Click Continue.
8. In the Description box, type a descriptive name like "Internet Camera Access," and then, click Done.
9. Click on Update.

To connect to the shared Camera from a remote location using a Mac or PC:

1. Start your favorite web browser.
2. Enter either your Public IP address or DDNS-provided Domain Name, followed by a colon and the Public port number that you choose in step 7 of the previous procedure. For example: http://123.123.123.123:8888 or http://www.mydtdnsdomainname.com:8888