CentOS Apache installation not responding

I always forget that in a raw CentOS server install the ip table needs to be configured to allow http calls on port 80 and port 10000 if you want to use Webmin. If you don't do this then the web server will not respond to browser calls because it can't.

Rules created with the iptables command are stored in memory. If the system is restarted before saving the iptables rule set, all rules are lost. For netfilter rules to persist through system reboot, they need to be saved.

# iptables -I INPUT 5 -m tcp -p tcp --dport 80 -j ACCEPT
# iptables -I INPUT 5 -m tcp -p tcp --dport 10000 -j ACCEPT

# sudo service iptables save

# service iptables restart