Uncomplicated Firewall - UFW
ufw service information
check status
ufw status
enable ufw
ufw enable
disable ufw
ufw disable
Firewall Policies
default outgoing policy
ufw default allow outgoing
default incoming policy
ufw default deny incoming
Control traffic to services
allow SSH
ufw allow ssh
note
If ssh is not running on a default port 22 then apply the ufw command pointing to the port
Assuming ssh is running on port 2222
ufw allow 2222/tcp
dryrun
ufw [--dry-run] enable|disable|reload
ufw [--dry-run] default allow|deny|reject [incoming|outgoing|routed]
ufw [--dry-run] logging on|off|LEVEL
ufw [--dry-run] reset
ufw [--dry-run] status [verbose|numbered]
ufw [--dry-run] show REPORT