Here are some useful steps for performing setup tasks for your DLink DIR-300 wireless router.
Access your DLink DIR-300 Wireless Router from your Computer
Open your Internet browser. Type the Internet Protocol (IP) address of your DIR-300 on the address bar of the browser and press the enter key.
Specify your DIR-300's Internet Protocol Address
This is the IP address of your router inside your wireless home network. The default is 192.168.0.1. Enter the IP address and the subnet mask that you want your router to use and click on the Enable DNS Relay check box to enable it. Click on the Save Settings button.
Stop DLink DIR-300 from Broadcasting your Network Name
Do this if you don't want your neighbors to know that you're using a wireless router for connecting your computers to the Internet. To stop your router from broadcasting your wireless network name, Click on Setup at the top portion of the router's configuration window. Click on Wireless Setup at the top left hand portion of the web-based router setup interface. Under Wireless Network Settings, click on the check box opposite Enable Hidden Wireless. Click on the Save Settings button. Now when you want to allow a new computer to access your router, the computer won't be able to find your wireless home network. You have to manually enter the name and password of your network on the network setup of the new computer.
Change your Home Wireless Network Password
Click on Setup at the top portion of your wireless router's configuration window. Click on Wireless Setup at the top left hand portion of the page. Find the space opposite the phrase Network Key and change it. Click the Save Settings button on the page.
Enable DHCP Service on your DLink DIR-300
The Dynamic Host Configuration Protocol (DHCP) is enabled by default in your wireless router. To disable it, Click on Setup at the top portion of the web-based configuration window. Click on the LAN Setup at the left hand portion of the window. Click on the check box opposite Enable DHCP Server to remove the check mark and disable it. Do the opposite to re-enable it. Input the range of IP addresses that you want your wireless router to distribute to computers that will use your wireless connection.
Reserve an IP address for a Computer in your Home Wireless Network
This step is needed if you want that one or more computers in your network will always receive a particular IP address when the computer boots. Click on Setup at the top of the configuration window. Click on LAN Setup at the left hand side of the window. Under DHCP Reservation, enter the computer name, the IP address that you want to reserve and the machine address of the wireless adapter of the computer that will use that IP address. Click on the Save Settings button on the page.
Synchronize your Router's Time with DLink's Internet Time Server
Click on Setup at the top of the router's configuration window. Click on Time and Date on the left hand side of the window. Under Automatic Time and Date Configuration, click the check box opposite Automatically synchronize with D-Link's Internet time server to enable it. Click on the button Update Now and then click on the Save Settings button on the page.
Enable Access Control in your DLink DIR-300 Wireless Router
Click on Advanced at the topmost portion of the router configuration page. Click Access Control on the left hand part of the page. Choose from the drop-down box what type of access control you want to implement in your wireless network. Enter the machine addresses of computers that you want to be affected by your access control rule. Click on the check box to enable the access control rule to be applied to that particular computer. Click on the Save Settings button on the page.
Stop your Router from Responding to Ping Requests
Ping is a computer command that checks if a computer with a certain IP address exists in a netwrok. It can be used by malicious people to locate a computer in your network. DLink recommends that this feature be disabled in your router. To disable it, click on Advanced at the top of the configuration page. Click on Advanced Network at the top left portion of the page. Under WAN Ping, click on the check box opposite Enable WAN Ping Respond to disable it. Click on the Save Settings button on the page.
Change your User Name and Password
Click on Maintenance at the upper portion of the window. Under Administrator, type in your new user name or password or both. Click the button Save Settings at the upper portion of the web-based interface.
Update your Wireless Router's Firmware
Click on Maintenance at the upper portion of the web interface. Under Current Firmware Info, click on the Check Now button. Follow on screen instructions if your firmware needs upgrade.
Setup Dynamic DNS Host Name for your Wireless Router
Click on Maintenance at the upper portion of the configuration window. Click on DDNS Setting at the left hand portion of the window. Enter your host name plus period plus dynamic DNS domain name. Enter your user name and password for the dynamic DNS service provider. Click on the DDNS Account Testing. Correct erroneous input if there is a problem and repeat the procedure.
Check if your Router has been given IP Address by your Internet Service Provider
Your DLink DIR-300 wireless router will not work without a valid IP address that is routable in the Internet. If you have been given a static address by your Internet service provider, you don't have to do this because your router will always have a routable IP address. Most commonly, your router is getting its address from the DHCP server of your Internet service provider. To check if your router has a routable IP address, click on Status at the top portion of the router configuration page. At the top left portion of the window, click on Device Info. Under Internet, check that the IP address and subnet mask are not all zeros. If they are, click on the DHCP Renew button to tell your router to get a new IP address from your Internet provider's DHCP server.
View your Router's Log
To view the messages made by your wireless router, click on Status at the top of the configuration window. Click on Log at the left hand side of the window.
Check which Computers are connecting with your DLink DIR-300 Wireless Router
Click on Status at the top portion of the DIR-300 configuration page. Click on Active Session at the left hand side of the page. Under the NAPT Session, you will have a number of IP addresses that are connected to your wireless router. If you know that you have a certain number of computers and cell phones that are connecting to your router right now, you should see the same number of entries here. If you have more, then probably someone out there is using your Internet connection for free.
Find out the Machine Addresses of Computers that are connecting with your Router
If you know all the wireless machine addresses of computers, PDAs and cell phones that are using your Internet connection, it is easy to find out if someone outside is connecting with your router. Click on Status at the top portion of the configuration page. Click on Wireless at the top left hand portion of the page. Under Connected Wireless Client List, you will see all the machine addresses of computers that use your Internet connection. If there is a machine address here that you don't know, then it is probably someone outside who is piggybacking on your Internet connection for free. Immediately change the Administrator user name and password for your DIR-300 wireless router. Change also your wireless home network's password. Make up long and difficult to guess passwords for both the router Administrator and the wireless network.
Read my article on how you can access your DLink DIR-300 wireless router from the Internet at: http://publishtoweb.blogspot.com/2010/01/how-you-can-access-your-dlink-dir-300.html.
Read my other article on Internet Protocol addressing for setting up DHCP on your DLink DIR-300 wireless router at: http://publishtoweb.blogspot.com/2011/12/internet-protocol-addressing-for.html.
Read an article on how to make up a more secure Windows password at: http://sites.google.com/site/ournewapproach/how-secure-is-your-windows-password.