1. Connect to CentOS server
View open ports:
`firewall-cmd --list-ports`
- 1
2. View the status of the firewall:
input the command
`firewall-cmd --state`
- 1
3. Turn on the firewall:
If the previous step is off, enter the command to enable the firewall:
`systemctl start firewalld.service`
- 1
4. Open the port
Enter the command to open port 8000:
`firewall-cmd --zone=public --add-port=8000/tcp --permanent && firewall-cmd --reload`
- 1
Close port 8000:
`firewall-cmd --zone=public --remove-port=8000/tcp --permanent`
- 1
Let's explain the previous command:
--zone=public: Indicates that the scope is public;--add-port=8080/tcp: Add port 8080 of the tcp protocol;--permanent: Permanently effective; (If there is no such parameter, it can only be maintained within the current service life cycle, and it will be invalid after restarting;)
5. Enter the command to re-enter the configuration:
`firewall-cmd --reload`
- 1
1. Connect to CentOS server
View open ports:
`firewall-cmd --list-ports`
- 1
2. View the status of the firewall:
input the command
`firewall-cmd --state`
- 1
3. Turn on the firewall:
If the previous step is off, enter the command to enable the firewall:
`systemctl start firewalld.service`
- 1
4. Open the port
Enter the command to open port 8000:
`firewall-cmd --zone=public --add-port=8000/tcp --permanent && firewall-cmd --reload`
- 1
Close port 8000:
`firewall-cmd --zone=public --remove-port=8000/tcp --permanent`
- 1
Let's explain the previous command:
--zone=public: Indicates that the scope is public;--add-port=8080/tcp: Add port 8080 of the tcp protocol;--permanent: Permanently effective; (If there is no such parameter, it can only be maintained within the current service life cycle, and it will be invalid after restarting;)
5. Enter the command to re-enter the configuration:
`firewall-cmd --reload`
- 1