1. An out-of-band management system for computer networks, the system comprising: a plurality of network nodes manageable through a dedicated management interface other than the data transmission interfaces wherein the plurality of network nodes use at least two different types of management interfaces that generate management data; a management module, executing on a computer, that converts the different types of management interface management data into a common management data format and that communicates the common management data format to a network management system; and the network management system further comprising a web server application, executing on a computer, that generates a graphical user interface based on the common management data format and a web-browser that permits a user to access the management module.