Linux firewall to open the relevant port and view the open port

The recent use of Apache to implement an HTTP service, published to Linux under the discovery of inaccessible, through Telnet to detect the connection, found that the port is not open.

This is because Linux does not open on the 80 port access caused by. The following command enables you to open a network port that allows for external access:

/sbin/iptables-i input-p TCP--dport 80-j ACCEPT #开启80端口/etc/rc.d/init.d/iptables Save #保存配置/etc/rc.d/init.d/iptables Restart #重启服务 to see if the port is open/etc/init.d/iptables status