Sits between two networks Used to protect one from the other Places a bottleneck between the networks All communications must pass through the bottleneck – this gives us a single point of control. Compare network and transport protocols to a database of rules and
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– this gives us a single point of control
protocols to a database of rules and
then forward only the packets that meet
the criteria of the rules.
in the TCP/IP stacks of workstation machines
packets from reaching your network
machine from responding to suspicious traffic
filtered router not instead of a filtered router
networks via the internet
between the two private networks
leased line but should be studied on
an individual basis
remains secure the VPN is impervious to exploitation
geographically diverse sites, always attempt to use
the same ISP to get best performance.
20 & 21 FTP