Locate My IP

A firewall is a hardware or software device which is configured to permit, deny, or proxy data through a computer network which has different levels of trust. There are hardware firewalls such as routers which contain firewalls in them, or even full blown hardware firewalls themselves, which aren't routers. Some command brands of routers that include firewalls are linksys, dlink, netgear, belkin, etc.

Then there are software firewall solutions, windows has its own built in firewall solution, some may argue about whether or not it is any good. There are others as well from companies such as Symantec/Norton and Check Point/Zone Alarm and several more.