Security question

[Juan]

Hi all.
I have FC4 installed.
I was trying to setup the firewall using the Desktop/Security level tab and
I mistakenly closed some ports I need open. 
When I realized my error I tried to get the setup screen again but now when
I click on Security Level nothing happens.
Is there a way to recover the functionality of "Security Level"?
I had to disable iptables at the services screen in order to have this box
usable but I am very concerned about its security.
Thanks in advance  
Juan 
 
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