Centos7 firewall firewalld

Links: http://www.qianxingweb.com

1. Check the firewall status

# Of parameters 
1, firwall-cmd: the operation is a tool provided for Linux firewall; 
2, - Permanent: provided persistent represented; 
. 3, - the Add-Port: The port is added; 
. 4, - Remove-Port: have been added to remove the port 
5, - add-port = 80 / tcp: single port opening 
6, - add-port = 8000-8999 / tcp: add a piece of port

　　

systemctl status firewalld
或
firewall-cmd --state

 

 

 

 

2. Check the firewall rules:

firewall-cmd --list-all

 

 3. Query port is open:

firewall-cmd --query-port=80/tcp

 

 4. Open Ports:

firewall-cmd --permanent --add-port=80/tcp

 

After successfully added [firewall-cmd --list-all] see the [ports] configuration does not take effect

　　

 

Restart the firewall: systemctl restart firewalld or view again, ports display port 80 has been configured successfully

　　

 

 5. Remove open ports:

firewall-cmd --permanent --remove-port=80/tcp

6. Open a while ports:

Open ports section: 
Firewall-cmd --permanent --add-Port = 8000-8999 / TCP　

 

 

 

 7. Restart the firewall configuration to take effect:

firewall-cmd --reload
或
systemctl restart firewalld