Or are they all destined to become overall system security applications/suites? There was a time firewalls were considered something that simply controlled traffic between networks. As things evolved more features were introduced and the definition of “firewall” and what it is/does will likely vary depending on whom you ask. Application control became popular. Then the original leaktest demonstrated a possible need for application checksums. Later the more advanced leaktests demonstrated the potential for application hijacking and .dll injection. Some provide ad, cookie, active content and other privacy and content filtering. Most firewalls now provide stateful inspection and are introducing intrusion detection systems and sandboxing capabilities as well. The various vendor offerings provide this added functionality via components/features within the application, plug-ins or application suites. Add in to the mix the increased public awareness to computer security issues and the vendors catering to a broader user base than before. With all this capability comes added complexity. Do we want all our eggs in one basket, so to speak? Is there such a thing as just a firewall anymore? …food for thought and discussion.