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Thursday, December 23, 2010

DHCP Reservations

Dlink Wireless Routers have an option that lets one reserve IP addresses, and assign the same IP address to the network device with the specified MAC address any time it requests an IP address.

This is almost the same as when a device has a static IP address except that the device must still request an IP address from the D-Link router. The D-Link router will provide the device the same IP address every time. DHCP Reservations are helpful for server computers on the local network that are hosting applications such as Web and FTP. Servers on your network should either use a static IP address or use this option.

In my case, i have assigned a range of IP addresses to a number of computers such that i am able to restrict on the time they can access the internet. e.g. all computers having the IP addresses ranging from 192.168.0.130 to 192.168.0.150 can not access internet from 08:00 -12:00 and then from 13:30 - 16:30 from Monday to Friday.

This sounds simple but fantastic to me.

Computer Name

You can assign a name for each computer that is given a reserved IP address. This may help you keep track of which computers are assigned this way. Example: mfile_Server .

IP Address :
The LAN address that you want to reserve.
MAC Address

To input the MAC address of your system, enter it in manually or connect to the D-Link router's Web-Management interface from the system and click the Copy Your PC's MAC Address button.

A MAC address is usually located on a sticker on the bottom of a network device. The MAC address is comprised of twelve digits. Each pair of hexadecimal digits are usually separated by dashes or colons such as 00-0D-88-11-22-33 or 00:0D:88:11:22:33. If your network device is a computer and the network card is already located inside the computer, you can connect to the D-Link router from the computer and click the Copy Your PC's MAC Address button to enter the MAC address.

As an alternative, you can locate a MAC address in a specific operating system by following the steps below:

Windows 98
Windows Me
Go to the Start menu, select Run, type in winipcfg, and hit Enter. A popup window will be displayed. Select the appropriate adapter from the pull-down menu and you will see the Adapter Address. This is the MAC address of the device.
Windows 2000
Windows XP
Go to your Start menu, select Programs, select Accessories, and select Command Prompt. At the command prompt type ipconfig /all and hit Enter. The physical address displayed for the adapter connecting to the router is the MAC address.
Mac OS X Go to the Apple Menu, select System Preferences, select Network, and select the Ethernet Adapter connecting to the D-Link router. Select the Ethernet button and the Ethernet ID will be listed. This is the same as the MAC address.

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