Was there no manual with this router? You can download one from D-Link here:
http://www.dlink.com/products/?pid=372 - under 'Product Manual'. It's a zipped pdf file so you will need to unzip it (Win XP can do that itself) and view it using the free acrobat reader or another pdf capable office package.
Warning before printing - It's 80 pages!
A brief overview:
You access the router's configuration via your web browser, by typing it's IP address in the navigation bar.
Thus
http://192.168.1.1 you will then see a logon screen and the default username and password are
admin. (Note if the router was preconfigured by your ISP these values may have been changed.)
See p42 for entering those DNS addresses.
Security - there are three types of security you can use - WEP, WPA and MAC addressing.
MAC addressingThis provides tight security since the router will only respond to computers that have their MAC address (a code embeded in their network card) listed on the router. The drawback is it takes away from the flexibility of the wireless network i.e. any new devices will not work until you update the router. You can also
block specific MAC addresses. You can combine this feature with WEP or WPA.
WEPWired Equivalent Privacy - This encrypts the data broadcast by the router with a 128bit "key" which you generate by choosing a phrase. You enter the same "key" in all the recieving PCs (clients) and they are then able to decode the data. Not as secure now as it used to be but adequate to deter casual intruders.
WPAWi-Fi Protected Access - This is a more secure alternative to WEP. It still uses "keys" but these are generated from a master password and
change automatically at pre-determined intervals. There is also a code buried in messages which authenticates the origin of the message. Ther are a number of ways to use WPA but the home user should select
PSK mode and use a password of
at least 20 characters.
To use WPA the client PCs must have Windows XP SP1 as a minimum.
Page 59 starts the wireless security configuration.
PasswordsYou must make a record of the passwords and key phrases used to set up your wireless security and keep them somewhere (secure) where you can find them. If you loose them you will not be able to add new equipment to the network without reconfiguring the router and all the PCs afresh.
Enable AP or the wireless network won't work.
The first password/key to provide is the
SSID (Service Set Identifier) this is basically the "name" of your wireless network. Something like MERTHYRBLUENET perhaps?
Then you select a
channel - pick a number.
Select WPA security and select 'PSK String'. In the 'String' box enter your
master password. Click Apply.
Decide whether you need to add the extra security of a MAC address access list.
Set the date and time on the router. Consider saving the router configuration to your hard drive.
That's it for the router. Set up WPA on your client PCs using the same details and you're done!