Add http/https access to iptables - CentOS 6

Edit iptables:

vi /etc/sysconfig/iptables

Add the following lines:

-A INPUT -p tcp -m state --state NEW -m tcp --dport 80 -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 443 -j ACCEPT

Restart iptables:

service iptables restart