The other day it was pointed out to me that my router, a Thomson Gateway from Plusnet, has a built in, enabled, firewall. That being the case do I really need another one such as the Zone Alarm or Windows firewalls which I have used at various times over the years or would the router firewall be sufficient?
Here's an article ClickHere that goes a little way to explain.
"There are two types of firewalls: hardware firewalls and software firewalls. Your router functions as a hardware firewall, while Windows includes a software firewall. There are other third-party firewalls you can install, too."