I need to change my nat type to play on xbox live, but i cant figure out how

There are several things you need to configure in order to change your NAT to open. Here's a link to help you out:
http://support.xbox.com/en-us/pages/xbox-live/troubleshoot/connection-issues/nat-type-strict.aspx
It has steps that can help resolve your issue.

How to Open ports on your router for xbox live. (wrong forum) If your NAT (Network Adress Translation) is "moderate" or "strict" you will only be able to play with people who have a open NAT. You can find out what you are by going to "System" on the Xbox 360 dashboard, click on "Network Settings" and test your connection. Upon passing all tests it will tell you your NAT status at the bottom.

If your using a router or other gateway device you need to port forward certain ports.

Open up your start menu, click on "Run..." type 'Command' once the command window comes up type, 'ipconfig /all' take note of your "Default gateway", you might need to scroll down.

Open up a browser window. Internet Explorer, Firefox, Opera...

Type your default gateway and it should access your router.

You may have to enter your username and password, if you havent changed it, it should still be default, 'admin' for both username and password, sometimes 'Username' and 'Password' if you cant figure it out contact the maker.

First off make sure UPnP (Universal plug and play)

Now, this varies for all routers, but usually its under Advanced Settings or something along those lines, some even have a port forward tab, others are called application sharing or using.

Then open ports, or open application ports or assign application/game.

The following ports must be opened...

UDP 88
UDP 3074
TCP 3074

..Sorted.

Any troubles email me.

If your default gateway doesnt work, or you cant get into your router go to www.portforward.com and look up your router.
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PS3 And XBOX :: BELKIN



Step 1:Connect Modem - Router - Computer (Wired)

Step 2:Open Router Setup by typing http://192.168.2.1 on the ad

you NAT type is most likely not open.
Without and open NAT, you xbox live connection will not be as efficient.

I have a tip on my page with detailed instructions on how to open you NAT.

You need to do port forwarding on your router. First, you must setup a static IP address on your XBOX. Then You must open these ports on your router setup page using Port Forwarding feature. 80 TCP and UDP, 53 TCP and UDP, 3074 TCP and UDP.

You can contact NETGEAR support to help you open the NAT settings. ( they know how to do it )

Note:
The simplest way and most efficient way to connect to xbox live is using DIRECT MODEM CONNECTION

For compatible list of devices and internet service provider, please check the website ( www.xbox.com )

First make sure your security type on the router is WEP-Personal. You may need to get the port range for that game or manufacturer. Then enter them in to the gaming tab. This will keep ports open all the time. NAT 2 is acceptable but you want NAT 1. Some internet connections cannot get NAT1.reply if you need further assistance

- Try to use admin for username and password field

You need to open all the ports for the xbox live. The NAT of that router model cannot be configured to open. Its just a simple NAT for internet connection.

Ok kids... all you hve to do is log in to your belkin 54g at http://192.168.2.1

Find out what ip address your xbox is using and then Click on the DMZportion of your settings on the left hand side of the page.

Enter the xbox's ip address and click the enable box.
Click apply.


Your NAT will now be OPEN!

Cheers!