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System Status: 

Restricted Regions - No Duo Service

Duo usage restricted in certain regions under U.S. sanctions.

In order to comply with U.S. regulations, the campus two-step login provider, Duo Security, has begun blocking authentications from users whose IP (Internet Protocol) address originates in a country or region subject to economic and trade sanctions enforced by the U.S. Office of Foreign Assets Control (OFAC). 

On April 14, 2022, Duo started blocking:

  • Crimea region
  • Donetsk region
  • Luhansk region
  • Sevastopol region

On May 5, 2022, Duo started blocking: 

  • Cuba
  • Iran
  • North Korea
  • Sudan
  • Syria

Students, staff and faculty operating in the above regions and countries should take note of the restrictions. More information is available in a knowledge base article on the Duo website

Individuals traveling professionally to these areas should generally assume that UC online resources will not be available to them. If you would like a consultation on digital security while in such areas, please contact Students are advised to immediately contact their academic unit.

Please note the following about the user experience in restricted regions:

  • If you're attempting to access a web-based application, you'll receive an error message. However, other applications, such as the campus VPN, will fail without providing the user any feedback. 
  • UC San Diego is unable to provide a workaround to this prohibition.
  • It applies to all uses of Duo two-step login (app push, phone call, sms, code, or token).
  • The restriction is based on location, not identity. In other words, citizenship doesn't matter; if your login attempt originates in a prohibited location, it will be blocked.
  • Users who are in a blocked region or country will not be blocked when they enter another country or return to the United States.

If you have further questions or need help with this matter, please contact the Service Desk at: