Ubuntu default firewall install, enable, configure, port, view status related information

Ubuntu comes with a relatively iptables, much simpler firewall configuration tool: UFW

UFW Firewall is uncomplicated firewall, not complex firewall, the cumbersome part of the setup still need to go to iptables

View firewall status

sudo UFW status

Firewall version

sudo UFW version

1. Installation

sudo apt-get install UFW

2. Enable　　

sudo ufw enablesudo UFW default Deny

After running the above two commands, the firewall is turned on and turned on automatically when the system starts.

All external access to the native is turned off, but the native access is normal externally.

3. Turn ON/off

sudo ufw allow|deny [service]

To turn a port on or off

4. Turn firewall on/off (The default setting is ' Disable ')

sudo ufw enable|disable

　　

eg

sudo ufw allow 3306

To enable MySQL to be accessed remotely, turn on MySQL Port 3306

　　

Ubuntu default firewall install, enable, configure, port, view status related information