centos开放端口

配置防火墙，开启80端口、3306端口 备份原有的 iptables , 添加合适的配置

cp /etc/sysconfig/iptables /etc/sysconfig/iptables_bak

vi /etc/sysconfig/iptables

添加端口开放

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

-A INPUT -m state --state NEW -m tcp -p tcp --dport 3306 -j ACCEPT

总体效果如下

###############添加好之后防火墙规则如下所示####################

# Firewall configuration written by system-config-firewall

# Manual customization of this file is not recommended.

*filter

:INPUT ACCEPT [0:0]

:FORWARD ACCEPT [0:0]

:OUTPUT ACCEPT [0:0]

-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT

-A INPUT -p icmp -j ACCEPT

-A INPUT -i lo -j ACCEPT

-A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT

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

-A INPUT -m state --state NEW -m tcp -p tcp --dport 3306 -j ACCEPT

-A INPUT -j REJECT --reject-with icmp-host-prohibited

-A FORWARD -j REJECT --reject-with icmp-host-prohibited

COMMIT

######################################################

关闭SELINUX

cp /etc/selinux/config /etc/selinux/config_bak

vi /etc/selinux/config

添加一行内容:

SELINUX=disabled

:wq保存退出

#重启系统

shutdown -r now