Centos7查看防火墙开放端口、状态、开放端口

太过爱你忘了你带给我的痛 2022-11-17 03:51 374阅读 0赞

# 查看防火墙状态 #

命令：systemctl status firewalld

[root@MyCloudServer home]# systemctl status firewalld
    ● firewalld.service - firewalld - dynamic firewall daemon
       Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: enabled)
       Active: active (running) since 四 2021-04-08 09:37:54 CST; 1h 46min ago
         Docs: man:firewalld(1)
     Main PID: 28871 (firewalld)
       CGroup: /system.slice/firewalld.service
               └─28871 /usr/bin/python2 -Es /usr/sbin/firewalld --nofork --nopid
    
    4月 08 09:37:54 MyCloudServer systemd[1]: Starting firewalld - dynamic firewall daemon...
    4月 08 09:37:54 MyCloudServer systemd[1]: Started firewalld - dynamic firewall daemon.
    4月 08 09:37:54 MyCloudServer firewalld[28871]: WARNING: AllowZoneDrifting is enabled. This is considered an insecure configuration option. It will be removed in a future release. Please consider disabling it now.
    4月 08 11:14:05 MyCloudServer firewalld[28871]: WARNING: ALREADY_ENABLED: 3306:tcp
    4月 08 11:14:11 MyCloudServer firewalld[28871]: WARNING: AllowZoneDrifting is enabled. This is considered an insecure configuration option. It will be removed in a future release. Please consider disabling it now.
    Hint: Some lines were ellipsized, use -l to show in full.

# 查看已开放的端口 #

命令：firewall-cmd --list-all

[root@MyCloudServer home]# firewall-cmd --list-all
    public (active)
      target: default
      icmp-block-inversion: no
      interfaces: eth0
      sources: 
      services: dhcpv6-client ssh
      ports: 3306/tcp
      protocols: 
      masquerade: no
      forward-ports: 
      source-ports: 
      icmp-blocks: 
      rich rules:

# 防火墙开放端口 #

命令：firewall-cmd --zone=public --add-port=3306/tcp --permanent

> 命令含义：  
> –zone \#作用域  
> –add-port=80/tcp \#添加端口，格式为：端口/通讯协议  
> –permanent \#永久生效，没有此参数重启后失效  
> firewall-cmd --reload 并不中断用户连接，即不丢失状态信息

重启防火墙: firewall-cmd --reload

[root@MyCloudServer home]# firewall-cmd --zone=public --add-port=3306/tcp --permanent
    success
    [root@MyCloudServer home]# firewall-cmd --reload
    success

# 使用总结 #

启动： systemctl start firewalld
    关闭： systemctl stop firewalld
    查看状态： systemctl status firewalld
    开机禁用 ： systemctl disable firewalld
    开机启用 ： systemctl enable firewalld

# 其他命令 #

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在这里插入代码片

> 附systemctl命令使用方法。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