Some ISPs do NOT work with the SWT proxy server. Others WILL work if you change out their default settings with a different browser, such as Netscape. This is important too. Some off campus employers or labs may be using a firewall that will prevent using the SWT proxy server. You may need to contact your network administrator at work to see if a firewall is in place.
Public schools are examples of employers that typically have firewalls within their system.
Additionally, some SWT campus dorms are still without ethernet connects. Also some campus labs may have restricted or limited 'net services. If you try to avoid the SWT proxy, you will not be able to access some of the propriety resources on campus, including Library databases. Most of the Library's databases authenticate users by an SWT IP address.