|Are you on your home or on a public wifi network?|
Some people are having trouble connecting their iPad to wifi networks.
Here are some tips:
Your iPad will discover wifi networks only within a certain range. If you are too far away it wont connect. And not all commercial wifi networks allow free Internet access and you may need to pay a fee (airports, hotels, etc.)
To connect to a network go to Settings / Wi-Fi on your iPad choose the network and if prompted enter the password.
Sometimes you need to renew the DHCP
Go to Settings / Wi-Fi Networks and tap blue arrow next to your home network. Select "Renew Lease" In the DHCP tab.
Forgetting the network
Go to Settings / Wi-Fi Networks and tap the blue arrow next to your home network. This time tap "Forget this Network" and wait for your iPad to reconnect.
On Safari's address bar type 184.108.40.206 (the IP address for google) If you get google.com this way only you may have DNS troubles.
To solve the DNS issue do this:
(You will need to do this with every new network that doesn't work)
Go to Settings and select Wi-Fi. Chose the network. Tap the blue arrow for the network you are trying. Select DNS and change/type 220.127.116.11 (OpenDNS IP address)