What are the attacks or vulnerabilities a firewall cannot protect my network from?
• Malicious traffic that does not pass through it, i.e. the firewall cannot monitor traffic flowing within the same network zone. For example, the firewall will not detect an employee spying on other computers on the same network zone. • Operating System backdoors that exploit public open ports. For example, a web server which is allowed access to the internet through port 80, cannot be protected from an attack exploiting port 80 (Such as IIS Buffer Overrun attack). • Tunneled traffic. • Computer viruses and Adware.
