Educate employees about e-mail attachments. Attachments, particularly executables, can be dangerous, dropping off a Trojan Horse that corrupts your system or allows infiltration later. You should educate employees about security basics, including the need to avoid open- ing attachments from unknown sources. Install a total solution. If you're securing your own system instead of relying on an ISP or Web host, don't just throw a firewall at a network and call it secure.
Firewalls do a great job of securing a perimeter, but no one device does the trick.
Complete solutions should include firewalls, intrusion detection, and policy management. Assess your security posture regularly. Don't secure and run. Hackers are constantly updating their technology. Small and medium-size businesses need to know how they stack up against the most current attacks.