Wei Li
Abstract
Starting from the conception of firewall, the essay probes into the three major technologies——the packet filter, the proxy and the stateful inspection and analyses four kinds of fire architectures: screening router, dual homed, screen host and screened subnet.
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Starting from the conception of firewall, the essay probes into the three major technologies——the packet filter, the proxy and the stateful inspection and analyses four kinds of fire architectures: screening router, dual homed, screen host and screened subnet.
Key concepts: Stateful firewall, Firewall (physics), Application firewall, Context-based access control, Subnet, Router, DMZ, Computer network