Firewall in ubuntu 18.04

Disable ufw

$ sudo ufw disable
Firewall stopped and disabled on system startup

Source: linuxconfig.org

Firewall in ubuntu 18.04

Managing UFW from command line
UFW ( Uncomplicated Firewall ) firewall is a default firewall on Ubuntu 18.04 Bionic Beaver Linux.
Check a current firewall status
By default the UFW is disabled. You can check the status of your firewall by executing the following linux command:

$ sudo ufw status
[sudo] password for linuxconfig: 
Status: inactive

For more verbose output append word verbose to the above command:

$ sudo ufw status verbose

Enable Firewall
To enable firewall execute:

$ sudo ufw enable
Command may disrupt existing ssh connections. Proceed with operation (y|n)? y
Firewall is active and enabled on system startup

Firewall, is now enabled:

$ sudo ufw status
Status: active

Source: linuxconfig.org

Similar codes

1 vote329 views4 answers
How to uninstall all extensions in vs code
Shell/Bash
0 vote269 views1 answer
Get all changes on commit name
Shell/Bash
0 vote338 views1 answer
Regex last word in lin
Shell/Bash
0 vote311 views1 answer
Install joplin using snap
Shell/Bash
0 vote303 views1 answer
Ex: java sr
Shell/Bash
0 vote320 views1 answer
Docker secrets max lenght
Shell/Bash
69 votes341 views6 answers
Python virtualenv
Shell/Bash
0 vote291 views1 answer
What to never type in powershell
Shell/Bash
0 vote308 views4 answers
How to empty a file in linux
Shell/Bash
1 vote304 views1 answer
Busybox
Shell/Bash