Serving as a vanguard of defenses for your computer from external threats and hacker attacks, PC Tools Firewall Plus is an impenetrable security application fortress. Constantly monitoring your computer's network applications, this security software effectively neutralizes threats and cyber-attacks from trojans, keyloggers and other malware. PC Tools Firewall Plus prevents these malicious software from potentially harming your system and stealing private information. Effective protection is already engaged at the default level while more experienced users can optionally build their own advanced packet filtering rules, including IPv6 support to customize their network defenses. PC Tools Firewall Plus offers highly sophisticated real-time internet and intranet protection and comprehensive network shielding systems, ensuring your computer system's integrity and reliability. And most of all, just like the best things in life, this personal firewall is totally free.