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Enabling DHCP

Your machine must have DHCP enabled to work with our network. We have provided instructions on how to do this for each of the following operating systems. Click on the operating system that you are using for instructions.

Configuring Windows XP

  • Click "Start"
  • Go to "Settings" and select "Network Connections"
  • Double-click on "Local Area Connection" and then click "Properties"
  • Select "TCP/IP" and click "Properties"
  • Select "Obtain an IP address automatically" and "Obtain DNS server address automatically"
  • Click "OK" to close the window
  • Click "OK" to close the "Local Area Connection Properties" window
  • Click "Close" on the "Local Area Connection Status" window.
  • Close the "Network Connections" control Panel
  • You will then be prompted to restart your machine

Configuring Windows Vista

  • Click Start (Windows ICON bottom left) and click Control Panel
  • Select Network and Sharing Center, and click Manage network connections from the list of tasks
  • Right click your Local Area Connection and click Properties
  • Select Internet Protocol Version 4 (TCP/IPv4) from the list and click the Properties button
  • Select Obtain an IP address automatically
  • Select Obtain DNS server address
  • Click OK

Configuring Windows 7

  • Click the Start button.
  • Select Control Panel.
  • Click the Network and Internet link.
  • Click the Network and Sharing Center link.
  • View your network connections.
  • Click the Change adapter settings link.
  • Right-click Local Area Connection and choose properties
  • Under This connection uses the following items:, select Internet Protocol Version (TCP/IPv4).
  • Click the Properties button.
  • Select the Obtain an IP address automatically radio button.
  • Select the Obtain DNS server address automatically radio button.
  • Click OK.

Configuring Mac OS X

  • Click on the Apple and select "System Preferences"
  • Choose "Network"
  • In the "Show" drop-down list, make sure that "Built-in Ethernet" is selected
  • In the "TCP/IP" tab, delete everything in the boxes, and select "Using DHCP" from the "Configure" drop-down list
  • Click "Save" and close "System Preferences"
  • Restart your machine to apply the above changes


What is DHCP?

To ensure that data from your computer always reaches the right target computer, such as a Web server, every connected computer connected to the internet has to have a identifier that is unique. This identifier is called the IP address. DHCP is a system increasingly used on networks whereby the IP address is allocated by a DHCP server as soon as you plug your computer into the network. The advantage of this is that if you move your computer
between different networks, say your home where you are connected to broadband, and the UCL Hall of Residence, you do not have to reconfigure your network parameters.