There are many limitations of traditional firewalls, such as the fact that they:

  • Typically operate below Layer 4
  • Have limited support for protocol inspection (that is, packet filtering)
  • Are only aware of “ports and sockets”

Modern-day hacker attacks present many security challenges due to the fact that they are:

  • Becoming increasingly complex
  • Frequently changing their attack vectors
  • Focusing on application vulnerabilities
  • Harder to detect and block on a firewall