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Date: Mon, 02 May 2011 11:41:23 -0300
From: Zhu Sha Zang <zhushazang@yahoo.com.br>
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Subject: blocking facebook
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I'm trying to block facebook access only using PF in FreeBSD 8.2.

But putting the name or the ip returned with the command host 
www.facebook.com i can't deny any user to connect facebook.

Some trick to do that?

Thanks for now.