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Trouble Connecting Using CU VPN

Steps to take if you cannot connect using Cornell's VPN service.

This article applies to: CU VPN


Verify that CU VPN service is running at: Status of CIT Services.

First Steps

  1. CU VPN sessions are limited to eight hours. After eight hours, the connection closes automatically. If your connection was dropped after the eight-hour limit, you can connect again. There is no limit on how often you can connect through CU VPN.
  2. In a hotel: Contact the hotel's IT staff. Sometimes hotels have firewalls in place that block CU VPN.
  3. Confirm you are able to use this service. CU VPN is restricted to Cornell faculty, staff, students, and affiliates with valid NetIDs. If you are a member of one of these groups, proceed to the next step.
  4. If you are on campus, make sure you are connecting via RedRover or eduroam.
  5. Test your credentials and confirm you are entering your password correctly by logging into Outlook on the Web.
  6. If you are able to log into Outlook on the Web, check to see if you've received a message saying your computer is quarantined. If this is the case, contact the computer support staff in your department, college, or unit.

Get Help

If you are not able to log in to Outlook on the Web, you may be using an incorrect password or you may be experiencing a service failure. Contact the computer support staff in your department, college, or unit, or the IT Service Desk.

Please be prepared to provide this information:

  • Your NetID
  • Time you tried to log in
  • Operating system on your computer
  • IP address you're trying to connect from

Specific Error Messages

More information about specific error messages. 

Error 412 - Remote Peer is no longer responding

If you see this message, it means the CU VPN concentrator dropped your connection. Many things can cause this, such as being on campus, having an unreliable Internet link, using a transparent tunneling protocol (TCP or UDP) that doesn't work well on your Internet link, and so on.

Check to see if you can find a more stable way to connect to CU VPN.

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