Before connecting the X-box or play station or Nintendo WII to the network, Make sure that you have all the wireless settings of the router.
You need to know the wireless network name, type of security on the wireless and security key or password. make sure that wireless MAC filter is disabled.
Click Here to know how to check the wireless settings of the router

Sometimes you get the error message NAT type is moderate or strict or NAT type2 / 3 .
In this case you need to change some settings on your router.

Reduce the MTU settings on the router. if the MTU on the router is set to 1500 then change the MTU to 1365.
You will also need to open some ports on the router .
For WII port numbers are ==> 28910, 29900, 29901, 29920, 80, 443.
For XBOX port numbers are ==> 53, 80-88, 3074
For Play station port numbers are ==> 80, 443-447 ,5223, 3478-3479, 3658, 10070-10080.

Click Here to know how to open the ports on the router

Basically there are 3 steps to connect to the wireless on X-box, play station or WII.

1. Check the wireless settings of the network. Click here to check the wireless settings
2. Reduce the MTU on the router and open the proper ports on the router. Click Here
3. Connect the gaming device to the network


X-box

Play station

Nintendo WII


Once you have all the settings of your network, you can try to connect to the wireless network on your gaming devices.