Firewall

Network-based firewall

• Next Generation Firewall
• Fortinet
• CheckPoint
• Pfsense

Host-based firewall

Windows Firewall

• Windows Defender

Linux Firewall

Kernel-Level Frameworks

• iptables - Traditional Linux firewall using netfilter hooks, supports IPv4
• nftables - Modern replacement for iptables, unified framework for IPv4/IPv6
• ebtables - Ethernet bridge firewall for layer 2 filtering
• arptables - ARP packet filtering

Front-end tools

• Firewalld
• Uncomplicated Firewall (ufw)
• Advanced Policy Firewall (APF)
• ConfigServer Security and Firewall (CSF)
• fail2ban

Application Firewall

• Application Firewall
• Web Application Firewall (WAF)

References

• Firewall (computing) - Wikipedia

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1. Claude, "Network vs host firewalls" 2025-08-22 ↩