Product's architecture
capacity (1) 
The architecture
is the combination of routers and hosts.
Be carefull with architectures
allowing all combinations of routers and hosts...
Learn to make the difference between:
The number of boxes in the architecture and
The number of filtering levels.
Make sure the product can:
Protect everything, even dangerous
services on a specific machine, including:
E-mail,
Anonymous FTP server,
Public WWW server.
Authenticate users on a machine
which:
is not exposed directly to an attack,
does not host potentially dangerous
services.
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