Internet connection problems

This morning I tried to get on the internet from my macbook pro, but when I opened the browser nothing happened. I checked the connection and my computer said there was nothing wrong with the ethernet connection. I can still use airport, but nothing will load using the land line. Can someone help me out here?

 

The only problem is I'm at school and the modem is built into the wall. I can't access it myself. I guess I'll have to have the tech guys here do something