CentOS7默认的防火墙不是iptables,而是firewall.
由于习惯了用iptables作为防火墙,所以在安装好centos7系统后,会将默认的firewall关闭,并另安装iptables进行防火墙规则设定
下面介绍centos7关闭firewall安装iptables,并且开启80端口、3306端口的操作记录:
[root@localhost ~]# cat /etc/redhat-release
CentOS Linux release 7.2.1511 (Core)
1、关闭firewall:
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[root@localhost ~]
# systemctl stop firewalld.service //停止firewall
[root@localhost ~]
# systemctl disable firewalld.service //禁止firewall开机启动
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2、安装iptables防火墙
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[root@localhost ~]
# yum install iptables-services //安装
[root@localhost ~]
# vim /etc/sysconfig/iptables //编辑防火墙配置文件
# 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
[root@localhost ~]
# systemctl restart iptables.service //最后重启防火墙使配置生效
[root@localhost ~]
# systemctl enable iptables.service //设置防火墙开机启动
[root@localhost ~]
# iptables -L //查看防火墙规则,默认的是-t filter,如果是nat表查看,即iptables -t nat -L
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二、关闭SELINUX
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[root@localhost ~]
# vim /etc/selinux/config
#SELINUX=enforcing //注释掉
#SELINUXTYPE=targeted //注释掉
SELINUX=disabled
//
增加
[root@localhost ~]
# setenforce 0 //使配置立即生效
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本文转自散尽浮华博客园博客,原文链接:http://www.cnblogs.com/kevingrace/p/5799210.html,如需转载请自行联系原作者