The secure wireless network on campus is called phswifi3. This is the network you should be using while on site. There is a guest network as well, however there are limitations as a number of applications and services you will use at the institute are not available from the guest network.
Open the System Settings app. Click on "Wi-Fi" in the sidebar. Hover over the phswifi3 network and click "connect".
Enter your MGB username and password in the login screen that appears.
Click "Continue" on this dialog box.
Wait a few moments for your device to connect to the network.
If it didn't work:
If it doesn’t connect or you see an error message, then you may need to "forget" the phswifi3 network and rejoin it.
To do this open the "System Settings" app, click "Wifi" in the side bar. Click the three dots to the right of the phswifi3 network, then choose "Forget This Network"
Select "Remove"
Now go back and try to connect to phswifi3 once again.