Category Archives: NAT

Understanding “NAT”


In extremely simple terms, NAT (Network Address Translation) helps determine how your router interacts with the rest of the internet. If your NAT settings are restrictive, you may have problems connecting to other players. To test your settings, go to the Xbox 360 Dashboard and test your connection. At the bottom of the test results, you will see your ‘NAT Type.’ You want it to say ‘Open’ – if it says ‘Moderate’ or ‘Strict’ you may experience some problems.

If you’re NAT settings display ‘Moderate’ or ‘Strict,’ you should consult your router’s documentation (That didn’t really help me), either online or in the instruction manual.


In computer networking, Network Address Translation (NAT, also known as Network Masquerading, Native Address Translation or IP Masquerading) is a technique of transceiving network traffic through a router that involves re-writing the source and/or destination IP addresses and usually also the TCP/UDP port numbers of IP packets as they pass through. Checksums (both IP and TCP/UDP) must also be rewritten to take account of the changes. Most systems using NAT do so in order to enable multiple hosts on a private network to access the Internet using a single public IP address (see gateway). Many network administrators find NAT a convenient technique and use it widely. Nonetheless, NAT can introduce complications in communication between hosts and may have a performance impact.

See also “Opening “NAT” For WRT54G Router”.

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Posted by on October 7, 2007 in NAT, XBOX 360


Opening “NAT” For WRT54G Router
Router: WRT54G Version 3
Firmware: Tomato Firmware found here.

Setup – Basic Setup

I had “static IP” which didn’t automatically configuring the IP address, mask and gateway of the provider. I was told by my provider to set this to “DHCP” so when the provider ends the lease on the current IP (whatever that is) I won’t loose my internet connection. This is very important because when the provider changes the IP address (because that particular IP lease is over) you wont be effected since you have it set to “DHCP” which automatically updates the IP coming in from the provider. By Factory default, this is on “DHCP” so do not change it.

Security – Firewall

By factory default the firewall tab has “Block Anonymous Internet Requests”, “Filter Multicast” and “Filter IDENT (Port 113) checked”. We also see “Filter Internet NAT Redirection unchecked”. Do not edit.

Application and Gaming – Port Range Forward

Here I have two entries: The first entry is start 3074 to end 3074 at both protocols for the Xbox 360 IP. The second one is start 30000 to end 30000 at both protocols for the Xlink program. Make sure you check the box at the end of each entry and make sure the IP for the box 360 is correct. Lastly the obvious, make sure you save the settings you change. For all possible ports please go here.

Application and Gaming – QoS

There are four ports here. Set the port that your 360 is connected to – to “High Priority” and leaving the “Flow Control” enabled for that port.

Please leave every other tab or settings at factory default if I didn’t mentioned them. Hope that helps. Please leave your comments and findings.

Also see:

Bricked your WRT54G Router?