by David Harris

Created on: October 21, 2008   Last Updated: November 13, 2008

A home network can be wired and/or wireless. If your network includes wireless (WiFi) then the most important thing you can do to avoid problems is to secure it. This means turning "encryption" on. When you do this, all data sent on the network is scrambled so any eavesdropper cannot, for example, see your logon ID and password when you check your bank balance online. Also, it means they cannot use your network to send, say, a few million spam emails, which will get your Internet connection blocked by your ISP. Eavesdroppers drive round using sensitive WiFi equipment to find unsecured networks so they can do these sorts of things. They also look to see if they can hack into your home PC.

You have to turn encryption on in both your WiFi router and your PC. Routers vary from model to model so consult the manual that came with it. As part of this you input a "key" which enables the router and PC to connect. They key is like a password so don't choose one that's easily guessed, like your street address! E.g., use your cat's name and last four digits of your phone number. No cat? Use a favourite color, anything that's random to a stranger.

With Windows Vista, later versions of XP or a Mac, it'll find your network and ask you for the key. Type it in (maybe twice) and you should get a connection. On earlier versions of Windows you may have to connect manually use Windows "Help and Support" from the Start button.

Sometimes it's really difficult to get WiFi working so enlist the help of your local PC shop or mobile support person. A major issue can be interference from cordless phones, microwave ovens, mobile phone headsets (Bluetooth) all of which work in the same waveband. If you have unreliable WiFi then call in a professional to diagnose and fix it.

There's very little you need to do to secure a wired network physical security is paramount here, so don't place your router in an unsecured garage!

Don't turn on file sharing if you don't need it in fact, get a PC professional to turn off all un-needed Windows services. This makes it almost impossible for an eavesdropper, even if they can hack through your encrypted WiFi link, to hack into your PC. Your money - and identity - are worth it!

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