Application level active networking
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This paper presents the architecture, the policy schema, and the policy specifications necessary to accomplish effective management of theApplication Level Active Networking (ALAN) environment. Using ALAN, developers can engineer applications through the network by utilisingplatforms (active servers) on which 3rd party software (proxylets) can be dynamically loaded and run. Redirection of packets destined foractive processing at the servers is performed by active routers. Management of such large, dynamic systems presents challenges tocentralised approaches. Management based on policies locally interpreted in the context of local state is gaining acceptance as an alternative.The IST project ANDROID is using a flexible generic specification for policies, represented in XML, allowing a wide range of policies to beexpressed and processed in a common framework. Policies given here focus on management of routers for VPN scenarios, resource andsecurity management of active servers running the proxylets, and management of the information distribution mechanism. Preliminary resultswere demonstrated during the trial which included the scenario involving the inter-site connectivity and active server resource and securitymanagement.