THE WAY THINGS ARE ON THE INTERNET THESE DAYS ITS BECOMING MORE IMPORTANT TO HAVE A GOOD FIREWALL.

ZONEALARM MAKE A RANGE OF VERY RELIABLE FIREWALLS INCLUDING A FREE EDITION

OUTPOST ARE ANOTHER COMPANY THAT HAVE STOOD THE TEST OF TIME.

THEY HAVE A GOOD RANGE OF FIREWALLS INCLUDING A FREE EDITION

SYGATE ARE ANOTHER COMPANY WITH A GOOD REPUTATION

KERIO ARE ANOTHER LONG STANDING COMPANY WITH A GOOD REPUTATION.

SMOOTH WALL IS A LINUX BASED FIREWALL AND NOT REALLY FOR THE BEGINNER TO TRY, BUT IT IS A GOOD WAY TO USE A OLD COMPUTER AS A FIREWALL ON A LOCAL AREA CONNECTION.