This is the software publisher's description.

PC Tools Firewall Plus is a powerful personal firewall for Windows that protects your computer from intruders and controls the network traffic in and out of your PC. By monitoring applications that connect to the network Firewall Plus can stop Trojans, backdoors, keyloggers and other malware from damaging your computer and stealing your private information.

PC Tools Firewall Plus is advanced technology designed specially for people, not experts. Powerful prevention against attacks and known exploits is activated by default and advanced users can also easily create their own packet filtering rules to customize the network defenses. All you need to do is install it for immediate and automatic ongoing protection.

That’s why PC Tools Firewall Plus provides world-leading protection, backed by regular Smart Updates, OnGuard real-time protection and comprehensive network shielding to ensure your system remains safe and hacker free. PC Tools products are trusted and used by millions of people everyday to protect their home and business computers against online threats.

We recommend you use PC Tools Firewall Plus in combination with Spyware Doctor for comprehensive system protection against spyware, adware and other threats.

The latest Firewall Plus v4 contains a number of new features including smart application rules that enable you to quickly set up how applications on your system access the Internet. The new Stealth Mode protection will hide your presence on your internal network and stop other computers from access your machine.