Set up wireless network

With new kernel versions (2.6.28+) wireless, wep and wpa, works out of the box. If you have an old stock kernel version, you should consider upgrading to (X)Ubuntu 9.04 or compiling a custom kernel found in this tutorial: Compile Kernel from git repository∞

For older kernels, an excellent guide for setting up wifi can be found in forum tutorial: PSUbuntu Wifi Alpha 0.1∞

Wireless works great on WEP-encrypted networks, but WPA is problematic. If your WiFi is WEP-encrypted, it can be enabled by clicking on the network icon (top right panel) and selecting manual configuration. Go to the Wireless connection properties, and type in the name of your network (ESSID). Select your WEP password type and enter the key for your router.

In Connection Settings, choose Automatic configuration (DHCP). Click OK, and enable the connection by clicking the radio button for Wireless. You should now have wifi internet access.

PSUbuntu forum: Network & Connectivity∞