Port Mapping with Airport Extreme -- nightmare

I can't remember where it is found in Airport Utility, but look for NAT. Try Internet tab, NAT, Configure Port Mapping. Set UDP or TCP port to what you need to forward and set the IP to the computer IP address.
I haven't configured that AEBS in a while, but every time I google for setup instructions, I get them for that base station instead of the new ones.

For static (manual) IP:
Go to Network system preferences, select the Service you are using to connect to internet (ie Airport), and click on Advanced. Click on TCP/IP and set it to configure Manually. Set up the IP address you want to use (set it higher than where the base station distributes IP addresses--default is 200). If you are using 192.168.1.x, set x to anywhere from 201 to 254. Set the other fields just like they were under DHCP.

Public port is the port that the world sees and private port is the port you send it to on your Mac. If you are not using a different port than the standard, then they both are the same.

Message was edited by: Barney-15E

Enable default host is like DMZ. You don't want to set it. You just want to forward the necessary ports to that static IP address.
Is the firewall on your Mac On? If so, you'll need to set it to accept connections on that port. However, it is an application-based firewall, so you would have to start the app you are using and it should ask if you want to allow connections on that app.

The xx is not sensitive. Almost everyone knows what it is. That address is one of three schemes for private networks. It hides behind the public IP address. That is why you need to port forward. You are poking a hole in the Firewall so that the world can see past your router.

Doh. Sorry, you should not be sharing a public IP address. Set it to Distribute IP addresses.
Set up the AEBS to create a network on either the 10.0.y.x, 172… or the 192.168.y.x network. then, set your mac to use the same network. Make sure y is the same as the router and the x is above the range that the AEBS distributes via DHCP (use 201 to 254--or decrease the top DHCP value and use something above that and below 254).

What are those settings for?
The router or the Mac?

They don't make any sense for the default router config. The settings you posted before didn't make any sense whatsoever and now I think I'm as confused as you. Despite what I said before, you want to share a public IP address. The numbers that you posted didn't make sense so I thought Shared was wrong, but it is not.

As for the static IP address, I'm not sure if it is the older base stations, the Apple routers in general, or Mac OS X, but you must enter DNS servers on the Mac--when you set up manually, it doesn't know where to get the DNS server so you can resolve names to IPs. You can just use the router IP address, which appears to be 192.168.1.64, but should be 192.168.1.1. I'm not sure why yours is not that. Again, very confusing and I don't know why (or how) it is configured that way.

My suggestion: hold down the reset button on the router until it blinks rapidly.
Then, set up the router from the system defaults to create a wireless network and distribute an IP address from 192.168.1.2 to 192.168.1.200 and set up your mac like this:
IP address: 192.168.1.201
subnet: 255.255.255.0
router: 192.168.1.1
For DNS, use 192.168.1.1 (the router, Or, use OpenDNS, 208.67.220.220, 208.67.222.222)

Given that the AEBS's IP address is a private network IP, I would say that your Modem is also a router and is also distributing IP addresses.

You can't have two routers on the network. It just doesn't work out well.
You can either configure your modem to port forward to your mac (which I don't know how to do) and set up the AEBS in Bridge Mode, or
You can set up the modem to bridge mode and have the AEBS share that public IP address.

Essentially, you've got two routers and the downstream Mac is confused as which one is doing what.

What's the model number of the Modem?

That was quite helpful. You linked the same picture, though.
Since I didn't see anything in the Modem menu items on the left regarding port forwarding, I would change the very last setting to "yes, use a public IP address." That will just send a single IP address out to the AEBS. You then set up the AEBS to share that IP address to everything that connects to it.

Then, set up the AEBS like I stated. I didn't go through setting up the other AEBS settings like wireless network name, wireless network encryption and password, AEBS password, etc. You need to set up those things, also.

Sorry I didn't catch onto the Modem/router issue from the beginning.

Go back to setting up your AEBS. It should now have an IP address that is not 192.168… or 172… or 10.0….
With it set to Share that IP address, it will send out IP addresses in the 192.168.1.2 to 192.168.1.200 range (or whatever you set). Go through the setup to give the network a name, set it for WPA/WPA2 and set a password. Give the base station a password, also. That is the password you'll need to get back in and configure it. The wireless password is the password you use to connect to the wireless network.

Hit Update and configure you Mac to have a manual ip address like I stated above. Hopefully, that will straighten out your network.