asterisk users - Jun 2007 - Firewall on AsteriskNow

hi,

Is it easy to add to the AsteriskNow system?

I am looking to use it to replace my older Asterisk box but I put my 
asterisk box on the internet and restrict access to specific IP 
addresses with APF firewall.. So it would be nice if I could install APF 
on AsteriskNow..

Thanks..