SMJ Solutions

Get a Router

September 3rd, 2005

If you have broadband, buy a router. A router is a simple standalone piece of hardware that allows more than one computer to share an Internet connection. If you own only one computer and have broadband, you still need a router.

Without a router, your computer is connected directly to the Internet. Or a better way to think of it is that the Internet has a direct connection to your computer.

With a router, your computer is on a separate network from the Internet (but still has access to the Internet). The router doesn’t let anything into the home network that doesn’t belong there. Specifically, a computer on your network must ask for information from the Internet for your router to allow information from the Internet to enter your home network.

The techology routers use to help share an Internet connection also adds a security layer to thwart worms, malware, and other internet-based attacks. This techology called NAT (which stands for Network Address Translation), essentially creates two separate networks.

Here is how it works: let’s say you request to access yahoo.com. Your request first goes to the router, which notes that you are making a request to yahoo.com, and forwards the request to yahoo.com. When a response comes back from yahoo.com, the router forwards the response back to the computer that issued the original request. If traffic comes in from Evil-Internet-Worm.com unsolicited, the router knows that no computer on the network has requested information from that site and blocks it. Evil-Internet-Worm cannot get through and infect your computer.

Routers are not terribly expensive, plain wired routers are around $30 and the increasingly popular wireless routers can be had for less than $100 and even cheaper on sale. Wireless routers need to be set up properly to make them secure, but offer the same separation from the Internet using NAT as wired routers do.

If you have broadband and you don’t yet have a router, you’re just asking for trouble.

Entry Filed under: Hardware,Networking,Security