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I made a script based on http://pgl.yoyo.org/adservers/index.php for slackware 11.0. The problem is every line it seems like the address I want to block is connect to.

Take this line for example (INTERFACE="ethX")

Code:

$IPTABLES -A OUTPUT -o INTERFACE -d 24pm-affiliation.com -j DROP

I get this error if it doesn't exist:

Code:

iptables v1.3.5: host/network `24pm-affiliation.com' not found

Try `iptables -h' or 'iptables --help' for more information.

Is there a better way to block ads though my router/NAT setup or a way for iptables to not try to connect?

I have over 1000+ lines that look like the above which makes loading the rules and viewing the rules (iptables -L) extremely slow.