FireWall in Centos 7 masked
How to resolve the error message below
Failed to issue method call: Unit firewalld.service is masked.
The main reason a service is masked is to prevent accidental starting or enabling of a serive.
For example firewalld can be masked with the following commad
#systemctl mask firewalld
If you ever want to start the firewalld service. you may get the error message
Failed to issue method call: Unit firewalld.service is masked.
To resolve this, unmask the firewall with the following command
#systemctl unmask firewalld
Source:http://theurbanpenguin.com/wp/?p=338
1、firewalld的基本使用
启动: systemctl start firewalld
查看状态: systemctl status firewalld
停止: systemctl disable firewalld
禁用: systemctl stop firewalld
2.systemctl是CentOS7的服务管理工具中主要的工具,它融合之前service和chkconfig的功能于一体。
启动一个服务:systemctl start firewalld.service
关闭一个服务:systemctl stop firewalld.service
重启一个服务:systemctl restart firewalld.service
显示一个服务的状态:systemctl status firewalld.service
在开机时启用一个服务:systemctl enable firewalld.service
在开机时禁用一个服务:systemctl disable firewalld.service
查看服务是否开机启动:systemctl is-enabled firewalld.service
查看已启动的服务列表:systemctl list-unit-files|grep enabled
查看启动失败的服务列表:systemctl --failed
3.配置firewalld-cmd
查看版本: firewall-cmd --version
查看帮助: firewall-cmd --help
显示状态: firewall-cmd --state
查看所有打开的端口: firewall-cmd --zone=public --list-ports
更新防火墙规则: firewall-cmd --reload
查看区域信息: firewall-cmd --get-active-zones
查看指定接口所属区域: firewall-cmd --get-zone-of-interface=eth0
拒绝所有包:firewall-cmd --panic-on
取消拒绝状态: firewall-cmd --panic-off
查看是否拒绝: firewall-cmd --query-panic
开启一个端口
添加
firewall-cmd --zone=public --add-port=80/tcp --permanent (--permanent永久生效,没有此参数重启后失效)
重新载入
firewall-cmd --reload
查看
firewall-cmd --zone= public --query-port=80/tcp
删除
firewall-cmd --zone= public --remove-port=80/tcp --permanent
apache
启动
systemctl start httpd
停止
systemctl stop httpd
重启
systemctl restart httpd
mysql
启动
systemctl start mysqld
停止
systemctl stop mysqld
重启
systemctl restart mysqld
php-fpm
启动
systemctl start php-fpm
停止
systemctl stop php-fpm
重启
systemctl restart php-fpm
nginx
启动
systemctl start nginx
停止
systemctl stop nginx
重启
systemctl restart nginx
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lsof -i tcp:80
列出所有端口
netstat -ntlp
1、开启端口(以80端口为例)
方法一:
/sbin/iptables -I INPUT -p tcp --dport 80 -j ACCEPT 写入修改
/etc/init.d/iptables save 保存修改
service iptables restart 重启防火墙,修改生效
方法二:
vi /etc/sysconfig/iptables 打开配置文件加入如下语句:
-A INPUT -p tcp -m state --state NEW -m tcp --dport 80 -j ACCEPT 重启防火墙,修改完成
2、关闭端口
方法一:
/sbin/iptables -I INPUT -p tcp --dport 80 -j DROP 写入修改
/etc/init.d/iptables save 保存修改
service iptables restart 重启防火墙,修改生效
方法二:
vi /etc/sysconfig/iptables 打开配置文件加入如下语句:
-A INPUT -p tcp -m state --state NEW -m tcp --dport 80 -j DROP 重启防火墙,修改完成
3、查看端口状态
/etc/init.d/iptables status
4.关闭防火墙
chkconfig –level 35 iptables off #此方法源自网络,未实验,安全考虑拒绝使用此方法