[conspire] Where to place information in Ubuntu Dist?

[Alan]

I've figured out with some help that using iptables at a command prompt 
like below I can block certain websites from being viewed on a system.  
However, once the system is rebooted the websites are once again 
accessible.  Would someone clue me in to where in the Ubuntu file system 
would I place a file containing all the web sites I'd like to block so 
when the system is rebooted the file is read and the sites continue to 
be blocked.

Much thanks in advance,
Alan

iptables -A OUTPUT -d 200.200.200.1 -j DROP
iptables -A INPUT -s 200.200.200.1 -j DROP