How many firewalls does one computer need?

I am asked that question many times when seeing some people’s setup.

I have seen setup’s with:

  • Windows Firewall
  • Antivirus Firewall ( The big antivirus packages usually have a firewall solution as well )
  • Software Firewall ( usually Zonealarm , or Comodo )
  • Hardware Firewall ( Your Router )

This really is overkill and can result and does result in a dramatic slowdown of your system.

Your router is the best firewall ( making sure plug n play is turned off ) and along with the Windows Firewall is more than sufficient.

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