Firewall Policy

Hi
I am an undergraduate student. I have a project related to the
firewall policy. Although I have got some material, I required some
more reference regarding the following topics. Any help would be
appreciated.
(1) What will be size of the firewall policy for an enterprise
network.
(2) What rules in general contain in the rule set i.e., accept. or
deny
(3) What are rules which are at the top of the rule set and which one
are the end of the rule set,
(4) and why the rules at the bottom of the ruleset have the lowest
priority than the rules at the top of the ruleset.

Yaseen
.

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