Tracking Internet Usage

I have recently been promoted to a new position after our network admin left.

He never showed me how to check out what websites a end user has been viewing.

I have been approached to build a report on websites a specific end user has been visiting. This was done before by the network admin but I will be darned if I know how he did it. Is there something I am missing.

What does everyone else use? Can anyone tell me where I should start looking.

We are using Cacti but it to be just a bandwidth tracker. we are also using a sonic wall and I don’t see anything in there for reports.

Is this something on the specific machine that I need to be looking at.

Thanks for all the help