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577.

Connecting to a wireless network for the first time

578.

If your computer has a wireless network card, you can connect to a wireless network. Most laptops and netbooks have a built-in wireless networking card.

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Ubuntu is usually able to detect any wireless network in range of your computer. To see a list of wireless networks, click on the \application{NetworkManager} icon. Under the ``Wireless Networks'' heading you should see a list of available wireless networks. Each network will be shown by its name and a signal meter to the left showing its relative signal strength. The signal meter looks like a set of bars similar to what is seen when viewing signal strength of a cell phone. Simply put, the more bars, the stronger the signal. To improve speed and reliability of your wireless connection, try moving closer to your router or wireless access point.

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A wireless network can be open to anyone, or it can be protected with a password. A small padlock will be displayed alongside the signal bar if any wireless networks within range are password-protected. You will need to know the correct password in order to connect to these secured wireless networks.

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To connect to a wireless network, select the desired network by clicking on its name within the list. This will be the name that was used during the installation of the wireless router or access point. Most \glspl{ISP} provide pre-configured routers with a sticker on them detailing the current wireless network name and password. Most publicly accessible wireless networks will be easily identifiable by the name used for the wireless network \dash for example ``Starbucks-Wireless.''

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If the network is unprotected (\ie, the signal meter does not show a padlock), a connection should be established within a few seconds\dash and without a password required. The \application{NetworkManager} icon in the top panel will animate as Ubuntu attempts to connect to the network. If the connection is successful, the icon will change to display a signal meter. An on-screen notification message will also appear informing you that the connection was successful.

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If the network is password-protected, Ubuntu will display a window called \window{Wireless Network Authentication Required} as it tries to make a connection. This means that a valid password is required to make a connection. This is what the screen should look like:

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Enter your wireless network password.

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If you know the password, enter it in the \textfield{Password} field and then click on the \button{Connect} button. As you type the password, it will be obscured from view to prevent others from reading the password as you type it. To verify the characters you are entering for the password, you can view the password by selecting the \checkbox{Show Password} check box. Then, you can make the password obscure again by deselecting the \checkbox{Show password} check box. Once the password is entered, click on the \button{Connect} button. The \application{NetworkManager} icon in the top panel will animate as Ubuntu attempts to connect to the network. If the connection is successful, the icon will change to display a signal meter. An on-screen notification message will also appear informing you that the connection was successful.

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If you entered the password incorrectly, or if it doesn't match the correct password (for example if it has recently been changed and you have forgotten), \application{NetworkManager} will make another attempt to connect to the network, and the \window{Wireless Network Authentication Required} window will re-appear so that you can re-type the password. You can hit the \button{Cancel} button to abort the connection. If you do not know the correct password, you may need to call your \acronym{ISP}'s customer support line or contact your network administrator.