Secure virtual private networks: the future of data communications
International Journal of Network Management
Computer Networks and Systems: Queueing Theory and Performance Evaluation
Computer Networks and Systems: Queueing Theory and Performance Evaluation
Capacity Planning for Web Services: metrics, models, and methods
Capacity Planning for Web Services: metrics, models, and methods
Dynamic Load Balancing on Web-Server Systems
IEEE Internet Computing
Evaluating Cluster-Based Network Servers
HPDC '00 Proceedings of the 9th IEEE International Symposium on High Performance Distributed Computing
Service Provider Networking Infrastructures with MPLS
ISCC '01 Proceedings of the Sixth IEEE Symposium on Computers and Communications
Queueing Networks and Markov Chains
Queueing Networks and Markov Chains
Computer
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In this paper we propose a new multi-filter firewall method instead of only a single e-mail server to enhance the efficiency of the processing of spam. The idea of a multi-filter firewall is to combine firewall, mail frontier and mail server, and with their different functions such as virus scan, anti-spam find, link brush-off in IP blacklist of unwelcome senders to ensure the safety of the mail server and efficient lift-up. In addition, to estimate system performance, we use a serial equivalent model representing a multi-filter firewall. Due to the use of the multi-filter firewall when processing e-mail our method stops spam by a cooperation method and reduces the workload of the actual mail server. For the receiving and sending nodes we use a Firewall Virtual Private Network (VPN) to share the loading for mail processing. Because the VPN is not only a virtual private Internet established between two nodes but also the use of Multi-Protocol Label Switching (MPLS), it is like an interior Internet passing data quickly between two nodes. MPLS supports Multi-Protocol Networks Transfer Protocol and core networks transfer with efficient label switching. MPLS VPN is also compatible with many communication protocols and supports free safety services.