🔹 – Made your computer invisible to port scanners on the internet. 🔹 Application Control – Granular rules per program (not just ports and IPs). 🔹 Free Version – Solid protection for home users at zero cost.
In the late 90s and early 2000s, broadband internet was spreading fast – and so were always-on threats like worms, backdoors, and port scanners. Windows had no decent built-in firewall until XP SP2 (2004). zonealarm checkpoint