ception and monitoring. The Event Handler Service maps SNMP traps to X.733 events and filters and correl- ates events. This service can be provided in a distributed fashion, where agents can be configured to work as a hierarchical tree, creating multiple levels for handling events. The Monitoring Service is responsible for collecting and monitoring information from managed network devices, so that alarms can be sent to the Event Handler Service to report abnormal conditions to the user. The mere use of a web-based interface does not introduce any important shift towards a distributed management paradigm. In WebComm, the web-based inter- face makes the entire management application available locally and remotely. The two main services in WebComm - events and monitoring - use CORBA as the main distribution mechanism. Hence they are independent of the user interface applica- tion, which could be rewritten in a different platform, even using a compiled language with a CORBA binding, while still using Lua for service configuration. 14.4 Products We now give an overview of some of the web-based network management products available. Optivity Software (Bay Networks) provides solutions for the campus and enter- prise environment by using a web-based network management approach. The OmniView application provides tabular and graphical views of network statistics for quick diagnostics and monitoring of network health collected from Bay Networks devices and industry-standard MIBs. Network Health (Concord Corporation) is a family of web-based software appli- cations that automate the collection, analysis and reporting of critical network data. Network Health discovers and collects vital data from existing devices in the net- work, condensing it into graphical presentations. The Nebula product line includes Nebula-ICC, Nebula-ATM, Nebula-NMS, Nebula-SNMS, Nebula Performance Monitor and Nebula MIB Explorer. The Nebula set of tools offers autodiscovery, real-time graphical reporting, multi-vendor MIB support, management policies