Description of the illustration basicproxyfirewall.gif
This graphic has on the left the label "Untrusted Clients" bounded by a dotted line. It is connected to "Firewall" which is further connected to "Load Balancer". To the right is a column of two-sectioned boxes labeled "HTTP Server" and "Proxy plug-in". This column of boxes is labeled "Web Layer" and is surrounded by a dotted line labeled "DMZ" along with Load Balancer. To the right of this column is a column of three boxes labeled "Servlet/Object Cluster". Each box contains the labels "JSP", "Servlet", "EJB", and "JDBC". On the bottom right is a Database.
Clients point to the Load Balancer through the Firewall. The Load Balancer points with three arrows to the Proxy plug-ins of each of the HTTP Servers. The Proxy plug-ins point as a group with three arrows to each of the boxes in the Servlet/Object Cluster and then to the Database.