Faculty and Staff

Configuring the UCSD VPN Client Software for Use With Older NAT Boxes (Windows)

Last updated August 20, 2009 6:40:45 AM PDT
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Learn how to configure your Windows 2000 or XP machine with an older NAT box to use the UCSD Virtual Private Network (VPN) to make a secure connection to the campus network.

Follow the listed steps to ensure that your VPN is working correctly. Some older NAT boxes have problems translating LAN to WAN. When this happens, the VPN client will connect successfully, but all applications start, hang, and eventually time out with a connection failed error.

Notes:

  • These instructions refer to computers running the Windows 2000 or XP operating systems and Cisco Version 4.0 or above of the Cisco Systems VPN Client.
  • You need to know your UCSD network username and password. If you've forgotten your username or password, see Getting or Changing UCSD Passwords.
  • Windows 2000 meets Minimum Network Connection Standards only if you've purchased an extended support contract from Microsoft.

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1. Open the client.

  • Open the Cisco Systems VPN Client.
  • Select the Connection Entry to modify.
  • Click the Modify icon.

    Task screenshot

2. Enable IPSec.

  • Under the Transport Tab, click on the box next to Enable Transparent Tunneling.
  • Choose Allow IPSec over UDP (NAT/PAT) if it's not already selected.
  • Click Save and try connecting again.

    Task screenshot

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For more information, contact the ACT Help Desk, (858) 534-1853.