We run a Barracuda 410 Web Filter. Not surprisingly, a user has found a way around the filter to get to Facebook. I'm more surprised that it hasn't happened sooner (or that I have only just found out). User is running IE9 and has no admin rights on the box.
I dealt with the HR side of things, informing his supervisor, etc. Any suggestions on where I should look for a hole to plug? I've done some googling on it but haven't come up with anything concrete yet that I think this user could have pulled off.
PM me if you'd rather not discuss potential security holes out in the open.