Advanced Policy Firewall vs Comodo Internet Security

Advanced Policy Firewall is a free GNU GPL firewall system for Internet-deployed Linux servers. It uses iptables/netfilter to combine static rules, stateful connection policies, and checks for attack patterns and forged source addresses. Administrators can configure granular inbound and outbound filtering, including rules based on users and applications. Additional controls include reactive address blocking, GeoIP country filtering, and Spamhaus and DShield lists. IPv6 dual-stack filtering can create ip6tables rules automatically. Documentation describes snapshots loading more than 1,000 rules in under one second, plus integrations with BFD, cron, systemd, Docker/Kubernetes, and logrotate. APF requires Linux, iptables/netfilter, and Bash, and supports legacy and nft backends. Listed systems include RHEL/Rocky/AlmaLinux 8 and 9, CentOS 6 and 7, Debian 12, and Ubuntu 12.04, 20.04, and 24.04. Development mode initially flushes the firewall every five minutes; only SSH port 22 is open by default.

Comodo Internet Security is a Windows security suite that combines antivirus protection, a packet-filtering firewall, host intrusion prevention, and automatic isolation for unknown files. Its Auto Sandbox runs unfamiliar files in a separate environment. The firewall can block unauthorized inbound and outbound connections, manage which programs can access the internet, and hide computer ports. Secure Shopping isolates browser sessions and includes keylogger prevention, screen-capture blocking, and SSL certificate inspection; it can also run applications such as email clients, password managers, spreadsheets, and VPN clients in that environment. The product describes cloud antivirus scanning, behavior analysis, and whitelisting, alongside malicious-website filtering with custom block lists. Comodo lists a free plan and paid plans from $29.99/yr. Its guide lists Windows 10, 8, and 7, and says versions 12.0.0.6882 and later do not support Windows XP or Vista. Support resources include Comodo Support, an online help guide, and a user forum.