Free Firewall

自 2012 年開始使用 COMODO Internet Security （簡稱 CIS 的5.12 版），至今已超過十年了，從 Windows 7 起，歷經 Windows 8、10（伺服器也可以安裝），最新版的 CIS 2025 Premium 則是支援 Windows 11 做優化，而且還是維持免費！

Comodo Internet Security (CIS) is developed and distributed by Comodo Group, a freemium Internet security suite that includes an antivirus program, personal firewall, sandbox, host-based intrusion prevention system (HIPS) and website filtering.

Comodo Firewall - Download World's #1 Free Firewall Software to protect your PC. Try Comodo's free firewall software for a fast and hassle-free online experience.

Comodo Internet Security 2025 provides comprehensive security against all internet threats with its Zero Trust desktop solution. Your PC is shielded by a powerful combination of Antivirus, Firewall, Real-time Scanning, and Application Sandboxing.

Comodo Antivirus with Internet Security combines powerful Virus Protection Software, an enterprise class packet filtering firewall, advanced host intrusion prevention, application control, and anti-spyware in one supremely powerful application.

COMODO Internet Security Premium is an antivirus system that aims to protect your system, files and folders against online threats. It includes an antivirus module, combined with firewall...

Comodo Internet Security, Comodo's award-winning free security suite, offers prevention-based, Default Deny Protection (DDP) technology to prevent malware in your PC. Conventional...