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centos6，centos7开放防火墙指定端口两种方法

作者 : ruankor
方法一：CentOS 6
0.防火墙操作
即时生效，重启后失效：
开启防火墙
/etc/rc.d/init.d/iptables start
关闭防火墙
/etc/rc.d/init.d/iptables stop
重启后永久性生效：
开启防火墙
chkconfig iptables on
关闭防火墙
chkconfig iptables off
1.开放指定端口
开放端口
/sbin/iptables -I INPUT -p tcp –dport 端口 -j ACCEPT
保存配置
/etc/init.d/iptables save
重启防火墙
/etc/rc.d/init.d/iptables restart
2.关闭指定端口
关闭端口
/sbin/iptables -I INPUT -p tcp –dport 端口 -j DROP
保存配置
/etc/init.d/iptables save
重启防火墙
/etc/rc.d/init.d/iptables restart
3.查看端口状态
查看
/etc/init.d/iptables status
4.清除防火墙规则
清除
iptables -F
若上面方面报错，则证明你服务器系统是Centos7以上，则用以下方法
方法二：CentOS 7
0.防火墙操作
查看防火墙
systemctl status firewalld
即时生效，重启后失效：
开启防火墙
systemctl start firewalld
关闭防火墙
systemctl stop firewalld
重启后永久性生效：
开启防火墙
systemctl enable firewalld
关闭防火墙
systemctl disable firewalld
1.开放指定端口
开放端口
firewall-cmd –zone=public –add-port=端口/tcp –permanent
重新载入
firewall-cmd –reload
2.关闭指定端口
关闭端口
firewall-cmd –zone=public –remove-port=端口/tcp –permanent
重新载入
firewall-cmd –reload
3.查看端口状态
查看端口
firewall-cmd –zone=public –query-port=端口/tcp
4.查询开放端口列表
查看列表
firewall-cmd –zone=public –list-ports
若开放了端口还是连接不上你想要的端口，注意：有可能是你服务器自带安全组策略限制的原因，这种情况需要在官方服务器管理控制台手动开放。
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软壳源码网 » centos6，centos7开放防火墙指定端口两种方法

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