CentOS VPS How to open 80 port to solve the problem that the website cannot open

If you are using the cloud server when the site appears to not open the situation, then most of the VPS 80 port is not open or blocked, then CentOS to open the VPS 80 port it? Need to open through the firewall, the specific with the small series together to understand the next bar.

CentOS Firewall to open port 80

#/sbin/iptables-i input-p TCP--dport 80-j ACCEPT

#/sbin/iptables-i input-p TCP--dport 22-j ACCEPT

And then Save:

#/etc/rc.d/init.d/iptables Save

Note the need to restart the service OH: Executive Service Iptabels Save and service iptables restart

Port View Method:

vhost]#/etc/init.d/iptables Status

Table:filter

Chain INPUT (Policy ACCEPT)

Num Target prot opt source destination

1 ACCEPT TCP--0.0.0.0/0 0.0.0.0/0 TCP dpt:80

2 ACCEPT TCP--0.0.0.0/0 0.0.0.0/0 TCP dpt:80

Chain FORWARD (Policy ACCEPT)

Num Target prot opt source destination

Chain OUTPUT (Policy ACCEPT)

Num Target prot opt source destination

Above is the CentOS system VPS Open 80 port method introduced, many people do not know how to view after opening 80 port, so this article also introduced the VPS 80 Port view method.