Administering an ISP Installation

Legacy Applications

You can set up a similar architecture for hosting Web applications that require a connection with some legacy systems. Through the back-end network you can set up a gateway to the legacy system that supplies data to your Web application. You can also build an isolated architecture in order to better protect the legacy system from undesired access by other network segments.

Isolating the various networks helps you set up particular security policies (dictated by customers such as banks) for only a limited number of servers, rather than securing the entire facility. In addressing security issues, you also need to address the costs involved and strike a balance.