Centos8和stream 9防火墙基本使用

news2024/9/20 5:31:29

查发行版：

[root@localhost nps-0.26.10]# cat /etc/redhat-release

CentOS Stream release 9

Centos8和stream 9防火墙基本使用_端口号

查看防火墙状态

systemctl status firewalld

Centos8和stream 9防火墙基本使用_重启_02

firewall-cmd --state

Centos8和stream 9防火墙基本使用_端口号_03

开启/关闭/重启防火墙

systemctl start firewalld

[root@localhost conf]# systemctl start firewalld  
[root@localhost conf]# firewall-cmd --state  
running

systemctl stop firewalld

[root@localhost conf]#systemctl stop firewalld  
[root@localhost conf]# firewall-cmd --state  
not running

systemctl restart firewalld

放行指定端口

firewall-cmd --zone=public --add\-port=端口号/tcp --permanent

firewall-cmd --zone=public --add-port=80/tcp --permanent # http  
firewall-cmd --zone=public --add-port=443/tcp --permanent #https

放行范围端口

firewall-cmd --zone=public --add-port=5000-6000/tcp --permanent

删除防火墙端口

firewall-cmd --zone=public --remove-port=5000-6000/tcp --permanent

修改防火墙后，都要对防火墙进行刷新

firewall-cmd --reload

查看防火墙某个端口是否开放与开放哪些端口

firewall-cmd --query-port=端口号/tcp  
  
firewall-cmd --zone=public --list-ports

Centos8和stream 9防火墙基本使用_发行版_04

关于firewall-cmd使用，请查看firewall-cmd -h

[root@localhost conf]# firewall-cmd -h  
Usage: firewall-cmd [OPTIONS...]  
General Options  
  -h, --help           Prints a short help text and exits  
  -V, --version        Print the version string of firewalld  
  -q, --quiet          Do not print status messages  
Status Options  
  --state              Return and print firewalld state  
  --reload             Reload firewall and keep state information  
  --complete-reload    Reload firewall and lose state information  
  --runtime-to-permanent  
                       Create permanent from runtime configuration  
  --check-config       Check permanent configuration for errors  
Log Denied Options  
  --get-log-denied     Print the log denied value  
  --set-log-denied=<value>  
                       Set log denied value  
Permanent Options  
  --permanent          Set an option permanently  
                       Usable for options marked with [P]  
Zone Options  
  --get-default-zone   Print default zone for connections and interfaces  
  --set-default-zone=<zone>  
                       Set default zone  
  --get-active-zones   Print currently active zones  
  --get-zones          Print predefined zones [P]  
  --get-services       Print predefined services [P]  
  --get-icmptypes      Print predefined icmptypes [P]