Linux firewall firewalld

Firewalld in Linux

2024-07-12

1. Firewalld in Linux

1. What is a firewall?

Mainly prevent network attacks, generally divided into software firewalls and hardware firewalls

2. The role of firewall

Protect the system from unauthorized access and attacks. Prevent hackers from exploiting vulnerabilities and displaying access to specific network services

3. Linux firewall classification

Centos7->Firewall->firewalld firewall

4. Firewalled

(1) Firewall service management

Start the firewall

# systemctl start firewalld

Stop the firewall

# systemctl stop firewalld

Restart the firewall

# systemctl restart firewalld

Check the firewall status

# systemctl status firewalld

Set startup

# systemctl enable firewalld

Set not to start at boot

# systemctl disable firewalld

Reload the firewall

# systemctl reload firewalld

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