Firewalls
Network firewalls, packet filtering, and intrusion prevention
User-friendly frontend for iptables. Simple command-line interface.
📦 Install Command
apt install ufw🔌 Default Ports
N/AN/AManages ports, doesn't use one
Modern packet filtering framework replacing iptables. Unified interface for IPv4/IPv6.
📦 Install Command
apt install nftables🔌 Default Ports
N/AN/APacket filter framework
Intrusion prevention - bans IPs with too many failed auth attempts. Works with many services.
📦 Install Command
apt install fail2ban🔌 Default Ports
N/AN/AMonitors logs, uses firewall for bans
Classic Linux packet filtering. Still widely used, being replaced by nftables.
📦 Install Command
apt install iptables iptables-persistent🔌 Default Ports
N/AN/APacket filter