Open Linux Firewall Port

Open port 80

Open flle /etc/sysconfig/iptables:
# vi /etc/sysconfig/iptables
Append rule as follows:
-A RH-Firewall-1-INPUT -m state –state NEW -m tcp -p tcp –dport 80 -j ACCEPT
Save and close the file. Restart iptables:
# /etc/init.d/iptables restart

via http://www.cyberciti.biz/faq/howto-rhel-linux-open-port-using-iptables/

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