The structure of FireWall
FireWall include:
One or more server systems connected to the router (router) or with router functionality.
The security management software running on the host system. Usually the systems administrator authentication (Authentication), authorization (Authorization) and accounting (Accounting).
The components of FireWall
A FireWall include one or more of the following components:
+ Filter packet (packet- filtering router ).
+ Application Gateway (Application-level gateway or proxy server).
+ port circuit (circuite level gateway
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