Config IPTables to provide a firewall by only exposing ports you want to communicate through.
service iptables start
chkconfig iptables on
service iptables status
iptables -I RH-Firewall-1-INPUT 3 -p tcp -m tcp –dport 80 –tcp-flags SYN,RST,ACK SYN -j ACCEPT
/etc/init.d/iptables save
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