Your computer's IP address may be outside of the accepted range of addresses managed by CNS (Communications Network Services). For a list of accepted ranges, go to the Virginia Tech IP Addresses (https://computing.vt.edu/content/virginia-tech-ip-addresses) Web page. Under Managed By, beside the CNS sections, the accepted IP address ranges will be displayed (http://www.computing.vt.edu/internet_and_web/internet_access/ipaddresses.html).

• Locate your IP address and compare it to CNS' accepted IP ranges. To do this, go to the Webbed Who_OU page (http://www.w2k.vt.edu/who_ou.php).
• Try to ping one of the restricted access domain controllers.
  1. Click the Start button.
     • In XP, select Run....
     • In Vista/7:
       1. Select All Programs.
       2. Select Accessories.
       3. Select Run.
  2. In the Open: text box, type: cmd
  3. Click OK.
  4. At the prompt, type: ping gc.w2k.vt.edu
  5. Press the Enter key. If you cannot ping the domain controller, your computer is outside of the acceptable range.
  6. At the prompt, type: exit
  7. Press the Enter key.

If your IP address does not fall into an acceptable range, set up a VPN client to tunnel network traffic through to an inside address. For more information, refer to the Virtual Private Network page (https://computing.vt.edu/content/virtual-private-network).