ufw
Uncomplicated Firewall: Ubuntu's simple front end for writing firewall rules.
In more detail
ufw default deny incoming sets the policy, ufw allow 22/tcp adds a rule and ufw enable turns it on and at boot. Allow SSH before enabling on a remote machine.
Related terms
- firewall — Software or a device that allows or blocks network traffic according to rules about direction, interface, protocol, port and source.
Taught in
- One Rule, Four Firewalls: firewalld, ufw, nftables And iptables — CompTIA Linux+ (XK0-006) Exam Prep
- Three PBQs Against The Clock: A Performance-Based Mock On Both Families — CompTIA Linux+ (XK0-006) Exam Prep
- Packet Filtering With nftables: A Default Drop That Stays Up — Linux Foundation Certified System Administrator (LFCS) Exam Prep
- Drill: A Gateway That Survives The Reboot — Linux Foundation Certified System Administrator (LFCS) Exam Prep