freebsd 6.0 personal firewall

[ilyana ramlan]

Hello,
I  have few questions:

1) How do i block websites by typing their url name
(eg. www.yahoo.com) using built in freebsd 6.0
firewall?

2) Do i have to configure the hosts.allow file to
block websites and must i know their IP address to
block websites? Can i block them by their URL names?

Thank you.

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