I can't execute pf commands

From: Date: Thu, 28 Jul 2011 16:09:01 +0000
Subject: I can't execute pf commands
Groups: php.general 
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Hi I use php5.3 on freebsd I also use pf ( packet filter) on it. I need to execute pfctl in php script. But I couldn't execute . I don't get any errors about that. Shell commands is allowed in php.ini My My script is below, shell_exec('pfctl -s nat'); exec('pfctl -s nat'); If I execute another command like this ; it works shell_exec('ls -l /var/tmp') ; What can the problem be ?

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