PC Tools Firewall Plus is a powerful personal free firewall that protects your computer from hackers and intruders. Firewalls control the network traffic in and out of your PC by monitoring applications that connect to the network. Firewall Plus can stop Trojans, backdoors, and keyloggers 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.